Author Topic: Halftone: Info on film to screen ratio  (Read 1811 times)

Offline Maxie

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Halftone: Info on film to screen ratio
« on: April 11, 2017, 02:40:12 PM »
If I remember correctly, you should multiply the film lpi x 4 or 4.5 to get to the correct mesh to us.
Where can I find written info on this?
Maxie Garb.
T Max Designs.
Silk Screen Printers
www.tmax.co.il


Offline Colin

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Re: Halftone: Info on film to screen ratio
« Reply #1 on: April 11, 2017, 02:52:55 PM »
Dunno, but you are correct.

With that said, you can go with higher lpi on thin thread mesh since the thread interference is less - because of the thinner threads.

With both film and Direct to Screen I can hold down to ~ a 2% - 3% dot @ 60 lpi on a 225S mesh.  Much harder to do with a standard 230 mesh.
Been in the industry since 1996.  5+ years with QCM Inks.  Been a part of shops of all sizes and abilities both as a printer and as an Artist/separator.  I am now the Ink and Chemical Product Manager at Ryonet.

Offline Dottonedan

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Re: Halftone: Info on film to screen ratio
« Reply #2 on: April 11, 2017, 05:08:05 PM »
Dunno, but you are correct.

With that said, you can go with higher lpi on thin thread mesh since the thread interference is less - because of the thinner threads.

With both film and Direct to Screen I can hold down to ~ a 2% - 3% dot @ 60 lpi on a 225S mesh.  Much harder to do with a standard 230 mesh.






I will print this art at 60lpi on our 225S mesh to see how we do.


For me, I prefer to use 5 as the divider for sim process or (higher mesh counts). I'd rather use 55lpi on 300 mesh and assure that I will be holding the 2% dots as best I can.  55 doesn't look much worse or better than 65 in sim process or cmyk.



I may look at what I can do using 4 or 4.5 with low mesh. You can hold a 3% in a 30lpi much easier. :)
Artist & high end separator, Owner of The Vinyl Hub, Owner of Dot-Tone-Designs, Past M&R Digital tech installer for I-Image machines. Over 35 yrs in the apparel industry. e-mail art@designsbydottone.com