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Is it happening on the cutter under pressure or before? We always print the "coated" side first and then the uncoated with a 35 micron powder cranked up on the uncoated side. We use a combination drier in the ink as well as drier in the water. Make sure the alcohol sub is at a minimum. We have...

Coating may be too thin. We have a three roll coater on one of our presses and it runs better with a thicker viscosity coating. Try adjusting the applicator roller.Back off the stripe to the blanket until it breaks up then bring it up just until it prints evenly. Meter roller may also need to be...

Check list: Did the ink change? Blankets, fountain solution, paper, rollers hardness. Did anything that was documented on your G7 run change? Sometimes vendors change raw materials without alerting the customer. Try reading the plate screen before printing and make sure it matches your G7 run...

Try switching papers, you are getting sheet distortion, it is very common. Think about what you did to that paper on the first pass through your press. You smashed the crap out of it, you hit it with four or five units of water, then you dried it out with the IR in your delivery. You could...

Alright, the tech rep came in this morning and looked at our issues and the preliminary determination is bad paper. We are submitting sheets for detail analysis, but it's pretty obvious. I must say, this guy was very helpful and did not shy aware from the problem. I am pleasantly surprised at...

We had another job on 100# McCoy Silk cover, 20x26 last night. Pulled it due to poor surface quality and switched to HannoArt Silk and ran great. Under close examination, the stock on one side is porous. The strange thing is, sometimes it prints fine and it does not show and other times it...

Thanks RKS, this is exactly the feed back we are looking for.

No offense, we know how the process works. We need to hear from other printers who may be having this problem with these papers. Paper is a huge cost and it's all going downhill. We know that we can file a claim and get our money for bad paper and press time but that does not help my production...

We know the routine and are not afraid to take it on. I want to know if anyone else is having this issue with these papers. These stocks are produced at the same mill on the same machine.

We are having surface issues with three different Sappi papers. McCoy Gloss cover, McCoy Silk cover and Opus dull cover. On one sheet the printing is perfectly smooth and on the next sheet it looks like we backed off the impression cylinder. When we hold up the sheet to examine, it's clearly a...

Rob, We throw in 5% alcohol and no sub when we run synthetic stocks. The sub retards the drying too much. The alcohol helps the water evaporate quickly as the synthetic stock does not absorb water like paper, it pushes the water back into the ink train. Now I understand the original issue you...

Rob, The first thing to do is make sure the water rollers are compatible with alcohol free printing. If you have used the press for any period of time with alcohol and then change the fount to use a sub, you most likely will have problems. You need to check the durometer of your rollers to make...

When you dump the water tank be sure to flush with fresh water until the water in the tank reads the same as tap water, before you add the fountain solution. We found that even though we were dumping every Friday, the conductivity shot up quickly after one day. After we started flushing our...

We checked all of the timer settings and changed a few of them to try and get more water out of the lines during washes. I also thought maybe the air solenoid under the water tank was sticking open but after watching it, it seems fine and if it were stuck, we would see water traveling up the...

We have a Harris and Bruno coating unit and recently had two instances where the coating in the drum has been diluted with water. We checked our timer settings and they seem fine for all the processes. We closely watch the drain and wash cycles and everything seems to be working fine, we cannot...

I love this question. Prior to G7, we ran everything K,M,C,Y because the purples look much better and uncoated stocks print cleaner with less mottle. We are short run printer and switch papers all day so this sequence saved us from washing up the press and moving the inks. Now that we are...

Ink and fount. Is it all colors or just magenta? Magenta usually shows any defects in chemistry first. First, check with the pre press dept. to see if their chemistry is up to snuff. Try developing and gumming a set of plates by hand to eliminate this variable. Then try keeping current fount...

I think the 66VI is a five color. Does the "C" stand for coater? We have three Shinos, a six color 66, six color 75 and a two color 66. Our older 66, six color is a 98 model with coater. The press prints excellent of you maintain it well and go through the grippers periodically. This press...

try using a torque wrench to tighten the blanket to spec. Are you coating over an ink that has a lot of wax in it?

Gordo, I read your piece on AM/XM screening and highlights. We are getting Fuji and Screen together to come up with the best screening technique for us. thanks for your help.