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“Help!Desk†is a special issue that discusses the difficulties of the service experts in the printing industry and provides a solution to the problem. Interested parties please fax, email or call the Society for Service Professionals in print (SSPP) to discuss issues and solutions related to your work or topics of interest.
<1> Color matching Dave Reeves is a service expert of GraphicSystem Co., Ltd. He proposed the following color matching problems and their solutions for your reference.
Do you have other opinions?
Recently I was printing a four-color sales flyer with four different knitted samples. The customer completed the photography, color separation, and provided me with film. The four different knitted samples on the film only had one scan. When the customer got the final print, he was very angry and could not believe because the color on the printed sheet did not truly reflect the color of the knitted sample itself. I wondered if I could avoid this situation. Later I realized that I was wrong (although it was unintentional) from the beginning. A negative film obtained by only one scan can produce only a "pleasant" color at most, and certainly cannot match the primary colors. The four different knitting samples only scan once, and the result can only be a huge "compromise" by the printer operator.
Unless the knitted samples on the final sheet are arranged in such a way that similarly colored samples are printed in the same direction of rotation. And without expensive computer operations, there is absolutely no way to make every sample look the same as the knitted fabric itself. Our solution is to place the fabrics 1 and 3 with the cyan main colors together and the main colors the fabrics 2 and 4 together. In this way, the printer operator can control the ink in the appropriate ink zone. Each printer's ink area and control capabilities are different. When a web or sheet passes, some printers can adjust and control the ink within a two-inch margin. These ink adjustments will change the total amount of ink distributed on the ink roller and the amount of ink applied to the sheet in the feed direction, helping those "pleasant" colors closer to the primary color of the knitted fabric itself.
However, when this type of film that has only been scanned once is used in a large press, keep in mind that there is a selectable dominant color in the ink area, and that the printer operator will also select a dominant color.
Afterwards, I think we should remind customers to do a partial scan. The customer should scan each knitted sample separately, must also individually proof the results of each scan, and finally consolidate the results into a negative. The most important thing is that I should know what the customer expects. Even so, when the customer submits the film, I know that the customer may not be able to predict the final result.
<2> Reorder Irene Chambers, a form printer CSR. She wrote to tell us a question about re-ordering, which she thought was simple. She said, "My client asked us to print an old Indiana. I think it's very simple. All I have to do is copy the previous job. I did it, but when I compared the preparation of two press jobs. There was a big difference between the two.When I realized that the paper used was different from the previous one, I had to panic and change everything to start over and finish the work immediately.Is this also happening to others?
of course. Let me explain a few reasons now. Sometimes printing companies will change their paper and ink suppliers and therefore potentially change the appearance, performance and feel of the prints. Although the steps of the operation did not change, the difference in material changed the appearance of the printed sheet. Even the same supplier may have minor changes in the internal components of the material (eg, differences in dyes, chemicals, or colors will result in different paper materials). The difference between the printing machine's working environment and the presses used for two operations will also have a great influence on the "consistency" of the final two prints. In order to ensure that you can immediately learn about the changes that have occurred, you should let the purchasing agent inform you of the new suppliers and products and arrange for them to send you samples of materials. After you get these samples of materials, you can be “acceptable†when comparing previous and current prints. You must also be careful with those "precise" re-orders, at least you should be aware of the types of defects that may occur.
<3> Raw Materials As a printing service provider, you should know that there is a large amount of ink on the ground that requires high ink hiding power, and it will also take a lot of time to dry, but the paper used on this print is you never met. The humidity of the environment is still very high. Can you foresee this problem?
Joewhestine, deputy manager of production at Plymouth Printing Company in Washington, answered the above questions in the affirmative. He believes that service providers should refuse such a print and not promise to deliver on time. Another person in charge said that anyone is likely to make mistakes. In order to minimize the error rate, he sends a daily production report every morning, and the heads of the various departments at noon get together to discuss the following days will encounter The printouts and its possible problems.
Billy P. Jackson, Columbus Litho-Krome's production planner, suggested: “When you are taking over a new batch of raw materials, ask suppliers and manufacturers to learn as much as possible about new products. This may be something the salesman will not tell. Yours.†Someone concluded: Once you have seen the sample and promised a delivery date, you should know how to print it! If you delay the delivery date, it is your own mistake, because after all you are an expert!
<4> Disk copy
Frank Taylor is Oregon
A service expert at a commercial printing company, he told us: One of their customers complained about the price issue due to disk copy. "My client gave me a disk and let us output it. When we output directly to the plate, we found that the color separation of one of the pages was incorrect. This means that we have to redo the color for this color." When we told customers the price, she was shocked and told us that the price of “repair†was much lower when we discovered this type of problem. When we told her that we were using a new type of direct platemaking system, we required that we Newer version, so the price is higher.She reminded me that I once told her that this system can reduce the price and save the cost.She keeps me speechless. Direct plate system can reduce the cost? "DTP (Director-to-plate The reason why the system can save cost is because it does not require negative film. Unfortunately, when a problem arises, it is the plate that is going to be remade, not the negative. The price of remanufacturing a plate is, of course, more expensive than taking a negative. However, there are still solutions.
First, customers who provide disk output should tell them to ensure that there is enough overprint on the disk. When using a direct plate-making system, film epitaxy or shrinkage is not possible because film is not used throughout the process. For this reason, enough overprinting should be considered on the disk to ensure proper registration. The customer also needs to provide a separate hard copy, 100% of the sample corrected for accuracy. This hard copy can be used by customers and printers to check colors, fonts, and images. When the process of direct plate making begins, hard copies can be used to identify that there is sufficient extension or shrinkage on the plate, and that the plate is in the correct position. When using film, hard copies can be placed on a bright workbench and placed under the film to compare the two. In this way, colors, fonts, and images can be checked before plate making.
<Five> Bindery "print service" heard a problem about binding, the front and back cover of the book has a 1/32 inch expansion. Customers always think that this is due to three sides of the cut. The President of Bindagraphics answered this question:
The cover is printed on the cover sheet of the single-sided coating (C1S) and is oiled after printing is completed. In order to make the moisture of the printed sheet escape, drying the cover requires a very high temperature for the process of applying the oil. Because of this heat, the sheet shrinks less. The work schedule stipulates that the binding is completed in one day, and the binding will be done immediately after drying. Three days later, when the cover faced moisture, they swelled. This problem of swelling will not occur if the schedule can be extended or the heat drying process not used. If the arrangement is extended in time, the cover can be regained moisture between the brightening of the oil and the binding and before cutting. Another solution is to use UV glazing—a fast, non-heating drying process. It may be more costly to adopt this method, but it can guarantee the delivery date, and there will be no accident of cover expansion. In addition, because the cover paper particles are parallel to the spine, the expansion of the cover will face the front of the book page; if the cover paper particles are perpendicular to the spine, the cover will expand from the sun to the foot, causing the spine to wavy. In this case, the spine that connects the cover or part of the cover will expand at the gluing, causing the spine to wavy.
<6> Barbara Robinson, a laser printer, writes and writes to us: “I'm not in the printing industry, but I have a question I want to ask, maybe it's something the printer may need to know. I happened to see an article in Service in Print. With regard to the various types of thermal copying, it is not used in laser printers.I noticed that there were smears on some forms or other office documents printed by laser printers in the office.If this phenomenon was not caused by thermal imaging, how could it be? how about this?
Using special inks, with a little care, marks or stains on printed forms or other documents can be avoided. These two types of laser printers often appear. In general, the cause of this problem is that the ink used is not heat resistant. In order to work well on laser printers, the ink used should contain certain volatile solvents and low melting point waxes. Heat-resistant raw materials must be used to ensure that the heat transferred from the laser fuser does not soften the ink and leave marks. If you want to use a laser printer, you should use a special ink that can adapt to the laser. The laser ink dries on the paper table, as if it should dry within the first 24 hours, but the fact is not the case. In this process, only the top layer is dry, ensuring that the ink on the contact surface dries. After the initial drying, it takes at least 72 hours before the ink is completely dry to adapt to the laser printer. In fact, although the recommendation is 72 hours, the final drying in some cases takes 2 weeks.
The accumulation of ink on the laser roller may also cause smearing. Some inks used in laser printers can also cause stacking, although these metallic or fluorescent inks seem to mitigate this problem. Another cause of the phenomenon of heaping ink is multi-color printing, especially four-color printing, using a variety of inks. In this situation. The ink film thickness on the document should be as thin as possible.
In order to avoid problems, some factors should also be considered in advance. Designers should try to eliminate large areas of the field or longer bars. Their design can follow such a principle: The ink roller of the laser printer first touches the inked portion and then contacts the non-inked portion. Try to extend the drying time as much as possible. Do not use shrink wrap. Because the shrink wrap removes air, air cannot continue to dry the prints.
In the office, you can specialize by changing the printer's ink. Allow the file to be exposed to the air for at least 24 hours near the printer. In this way, the paper is adapted to the surrounding environment, jamming is less likely to occur when passing through the printer, and the ink gets more drying time
<1> Color matching Dave Reeves is a service expert of GraphicSystem Co., Ltd. He proposed the following color matching problems and their solutions for your reference.
Do you have other opinions?
Recently I was printing a four-color sales flyer with four different knitted samples. The customer completed the photography, color separation, and provided me with film. The four different knitted samples on the film only had one scan. When the customer got the final print, he was very angry and could not believe because the color on the printed sheet did not truly reflect the color of the knitted sample itself. I wondered if I could avoid this situation. Later I realized that I was wrong (although it was unintentional) from the beginning. A negative film obtained by only one scan can produce only a "pleasant" color at most, and certainly cannot match the primary colors. The four different knitting samples only scan once, and the result can only be a huge "compromise" by the printer operator.
Unless the knitted samples on the final sheet are arranged in such a way that similarly colored samples are printed in the same direction of rotation. And without expensive computer operations, there is absolutely no way to make every sample look the same as the knitted fabric itself. Our solution is to place the fabrics 1 and 3 with the cyan main colors together and the main colors the fabrics 2 and 4 together. In this way, the printer operator can control the ink in the appropriate ink zone. Each printer's ink area and control capabilities are different. When a web or sheet passes, some printers can adjust and control the ink within a two-inch margin. These ink adjustments will change the total amount of ink distributed on the ink roller and the amount of ink applied to the sheet in the feed direction, helping those "pleasant" colors closer to the primary color of the knitted fabric itself.
However, when this type of film that has only been scanned once is used in a large press, keep in mind that there is a selectable dominant color in the ink area, and that the printer operator will also select a dominant color.
Afterwards, I think we should remind customers to do a partial scan. The customer should scan each knitted sample separately, must also individually proof the results of each scan, and finally consolidate the results into a negative. The most important thing is that I should know what the customer expects. Even so, when the customer submits the film, I know that the customer may not be able to predict the final result.
<2> Reorder Irene Chambers, a form printer CSR. She wrote to tell us a question about re-ordering, which she thought was simple. She said, "My client asked us to print an old Indiana. I think it's very simple. All I have to do is copy the previous job. I did it, but when I compared the preparation of two press jobs. There was a big difference between the two.When I realized that the paper used was different from the previous one, I had to panic and change everything to start over and finish the work immediately.Is this also happening to others?
of course. Let me explain a few reasons now. Sometimes printing companies will change their paper and ink suppliers and therefore potentially change the appearance, performance and feel of the prints. Although the steps of the operation did not change, the difference in material changed the appearance of the printed sheet. Even the same supplier may have minor changes in the internal components of the material (eg, differences in dyes, chemicals, or colors will result in different paper materials). The difference between the printing machine's working environment and the presses used for two operations will also have a great influence on the "consistency" of the final two prints. In order to ensure that you can immediately learn about the changes that have occurred, you should let the purchasing agent inform you of the new suppliers and products and arrange for them to send you samples of materials. After you get these samples of materials, you can be “acceptable†when comparing previous and current prints. You must also be careful with those "precise" re-orders, at least you should be aware of the types of defects that may occur.
<3> Raw Materials As a printing service provider, you should know that there is a large amount of ink on the ground that requires high ink hiding power, and it will also take a lot of time to dry, but the paper used on this print is you never met. The humidity of the environment is still very high. Can you foresee this problem?
Joewhestine, deputy manager of production at Plymouth Printing Company in Washington, answered the above questions in the affirmative. He believes that service providers should refuse such a print and not promise to deliver on time. Another person in charge said that anyone is likely to make mistakes. In order to minimize the error rate, he sends a daily production report every morning, and the heads of the various departments at noon get together to discuss the following days will encounter The printouts and its possible problems.
Billy P. Jackson, Columbus Litho-Krome's production planner, suggested: “When you are taking over a new batch of raw materials, ask suppliers and manufacturers to learn as much as possible about new products. This may be something the salesman will not tell. Yours.†Someone concluded: Once you have seen the sample and promised a delivery date, you should know how to print it! If you delay the delivery date, it is your own mistake, because after all you are an expert!
<4> Disk copy
Frank Taylor is Oregon
A service expert at a commercial printing company, he told us: One of their customers complained about the price issue due to disk copy. "My client gave me a disk and let us output it. When we output directly to the plate, we found that the color separation of one of the pages was incorrect. This means that we have to redo the color for this color." When we told customers the price, she was shocked and told us that the price of “repair†was much lower when we discovered this type of problem. When we told her that we were using a new type of direct platemaking system, we required that we Newer version, so the price is higher.She reminded me that I once told her that this system can reduce the price and save the cost.She keeps me speechless. Direct plate system can reduce the cost? "DTP (Director-to-plate The reason why the system can save cost is because it does not require negative film. Unfortunately, when a problem arises, it is the plate that is going to be remade, not the negative. The price of remanufacturing a plate is, of course, more expensive than taking a negative. However, there are still solutions.
First, customers who provide disk output should tell them to ensure that there is enough overprint on the disk. When using a direct plate-making system, film epitaxy or shrinkage is not possible because film is not used throughout the process. For this reason, enough overprinting should be considered on the disk to ensure proper registration. The customer also needs to provide a separate hard copy, 100% of the sample corrected for accuracy. This hard copy can be used by customers and printers to check colors, fonts, and images. When the process of direct plate making begins, hard copies can be used to identify that there is sufficient extension or shrinkage on the plate, and that the plate is in the correct position. When using film, hard copies can be placed on a bright workbench and placed under the film to compare the two. In this way, colors, fonts, and images can be checked before plate making.
<Five> Bindery "print service" heard a problem about binding, the front and back cover of the book has a 1/32 inch expansion. Customers always think that this is due to three sides of the cut. The President of Bindagraphics answered this question:
The cover is printed on the cover sheet of the single-sided coating (C1S) and is oiled after printing is completed. In order to make the moisture of the printed sheet escape, drying the cover requires a very high temperature for the process of applying the oil. Because of this heat, the sheet shrinks less. The work schedule stipulates that the binding is completed in one day, and the binding will be done immediately after drying. Three days later, when the cover faced moisture, they swelled. This problem of swelling will not occur if the schedule can be extended or the heat drying process not used. If the arrangement is extended in time, the cover can be regained moisture between the brightening of the oil and the binding and before cutting. Another solution is to use UV glazing—a fast, non-heating drying process. It may be more costly to adopt this method, but it can guarantee the delivery date, and there will be no accident of cover expansion. In addition, because the cover paper particles are parallel to the spine, the expansion of the cover will face the front of the book page; if the cover paper particles are perpendicular to the spine, the cover will expand from the sun to the foot, causing the spine to wavy. In this case, the spine that connects the cover or part of the cover will expand at the gluing, causing the spine to wavy.
<6> Barbara Robinson, a laser printer, writes and writes to us: “I'm not in the printing industry, but I have a question I want to ask, maybe it's something the printer may need to know. I happened to see an article in Service in Print. With regard to the various types of thermal copying, it is not used in laser printers.I noticed that there were smears on some forms or other office documents printed by laser printers in the office.If this phenomenon was not caused by thermal imaging, how could it be? how about this?
Using special inks, with a little care, marks or stains on printed forms or other documents can be avoided. These two types of laser printers often appear. In general, the cause of this problem is that the ink used is not heat resistant. In order to work well on laser printers, the ink used should contain certain volatile solvents and low melting point waxes. Heat-resistant raw materials must be used to ensure that the heat transferred from the laser fuser does not soften the ink and leave marks. If you want to use a laser printer, you should use a special ink that can adapt to the laser. The laser ink dries on the paper table, as if it should dry within the first 24 hours, but the fact is not the case. In this process, only the top layer is dry, ensuring that the ink on the contact surface dries. After the initial drying, it takes at least 72 hours before the ink is completely dry to adapt to the laser printer. In fact, although the recommendation is 72 hours, the final drying in some cases takes 2 weeks.
The accumulation of ink on the laser roller may also cause smearing. Some inks used in laser printers can also cause stacking, although these metallic or fluorescent inks seem to mitigate this problem. Another cause of the phenomenon of heaping ink is multi-color printing, especially four-color printing, using a variety of inks. In this situation. The ink film thickness on the document should be as thin as possible.
In order to avoid problems, some factors should also be considered in advance. Designers should try to eliminate large areas of the field or longer bars. Their design can follow such a principle: The ink roller of the laser printer first touches the inked portion and then contacts the non-inked portion. Try to extend the drying time as much as possible. Do not use shrink wrap. Because the shrink wrap removes air, air cannot continue to dry the prints.
In the office, you can specialize by changing the printer's ink. Allow the file to be exposed to the air for at least 24 hours near the printer. In this way, the paper is adapted to the surrounding environment, jamming is less likely to occur when passing through the printer, and the ink gets more drying time
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