screen printing > Screen Making

something I learned yesterday

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Frog:
I bet, for those with the ability to measure, their EOM can vary seasonally with the temp of the shop.

I have heard of shops refrigerating their emulsions to aid thick coating.

alan802:
I've always used solids content as a judge for whether or not an emulsion might be suitable for us, and that is not a good idea as I've learned.  I'm not sure what the PHW Red is rated at solids content wise but it's as thick as some of our plastisol inks are and it's some great stuff for building eom.  I played around yesterday like I said earlier and I have some screens ready to experiment with.  I also have a new white ink mixture I made that I'm ready to put through a screen.  Pics and updates to come.

Hope everyone is having a good Friday, I know we are... we are printing 1800 light colored garments with black on the back and 6 colors on the front...money maker baby.

jsheridan:
The solids are what bridge the holes of the mesh and allow us to hold fine detail and build strength, think of a PNG8 file vs PNG24 file. The more blocks you have, the denser the emulsion, and when properly cross linked form a chain that won't break down under the the traumatic experience of long press runs.

The viscosity is just the carrier to get the goo on and to hold it's shape during drying. Thin emulsion will sag and thick stuff can experience long drying times.

You want to see the difference solids makes, take a 160 mesh with a 20% EOM and burn a 35% solids emulsion, then a 45-50% and look at them under a 60-100x scope, the devil is in the details.

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