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A test print prior to production is a very good idea. If you aim high - it is mandatory, IMHO. It should be done on the same stock and on the same press as your actual printing. Start by having the press operator print some sheets with the machine set up as "normal" as possible. Make sure they...

Try taking the old fashioned route, ask the printers if they can guarantee a 90-95% match to a hard copy proof produced at their shop (or by someone they regularly works with). If the do, that will be your stating point. Once you have the proofs and they meet your approval, go and supervise the...

During the '90s DuPont sold a set of Chromalin powders (besides the basic CMYK) that were meant to be mixed for creating Pantone spot colors. We always ended up with plenty of jars of the "not quite right" shades. We had scores of jars with samples of the color shades stuck outside. Even trying...

I am not familiar with your machine but - if you can access the vacuum table, you can temporarily tape over the holes that are exposed outside the area actually covered by the board you print onto. That should increase your vacuum hold down considerably.

Makes sense, if it's really fine artwork than it probably wasn't silkscreend a hundred years ago. However, modern silkscreening can achieve qualities that were unheard of not very long ago. Text height of 0.8 mm and line width finer than 0.12 mm are regularly printed on PCBs. I also saw some...

BTW, ink film thickness will generally be higher in silkscreen printing.

Still, it may have been Silkscreen printed. Any of several techniques could have been used that could hide mesh involvement.

A colleague told me that when he found out that the unloading rollers on his Lotem became sticky, he was under a production bottleneck and couldn't stop the machine. So he used Heat Shrinkable Tubing onto a roller and it saved his day...

Old Dolevs and Lotems suffer from rubber rollers melting into sticky messy stuff. We regularly check for rollers getting softer. Stripping and redressing rollers is much easier before they start leaking...

Why are you retiring your Avantra?

Look if you can find a filter in the beam path. If you find one - try to remove it an expose a test film.

My observations/comments are probably obvious enough and I an not familiar with this machine, but anyway: It could well be a failing component on a board that passes the initial test but overheats and later fails. I usually start troubleshooting by unplugging suspected boards, cleaning the...

This link may be usefull in many cases: https://www.templatemaker.nl/en/

Screening is visually least noticeable around 45° angle. LPI and mesh should go hand in hand, choose combinations from mesh manufacturer tables.

Which reminds me of the case in the late Nineties, when I was contacted to advise on improving the print results of a brand new web offset press. I spent a couple of hours by the press reading color bars and indicating shortcomings, but the press operators couldn't get the press to print an...

Perhaps you should look into appyling the glue by Silkscreen printing.

Perhaps the ink is too "long"? In the sense that it slightly increases dot gain.

Perhaps a practical, handy solution is to turn that old PC into a Virtual Machine and run it from within a new, powerful computer. One caveat - some dongles are not recognized...

This reminds me of an obserbant customer who told me once, after watching how we fixed his problematic job that although he comes from a different industry (Electronics) he realizes now that we share much the same difficult situation because in both our fields "sometimes to achieve 10% higher...

Some, I agree. But for the rest - I'd much rather deal with the equipment...