[veeeeeee]

Hi everyone, I'm pretty new to screen printing and would like to ask a few questions. I'm trying to do a 2 color halftone screen printing but it doesn't go well, the shades cannot be printed out accurately.

Here's the details of my work:

- the 2 screens were burnied seperately (240 dpi, 35 lpi, 30 and 60 degree)

- screen mesh count 150

- water based ink printed on 100% cotton fabric

So where's the problem I've done wrong? Thanks for your advice!

 

[PhilR]

150 mesh is kinda low for halftones but I've managed a 35lpi print through similar using plastisol.

How does the screen itself look? Are the dots clearly exposed, no unwanted washout?

Also, how are you doing the actual print? Halftones demand you really have your squeegee technique down. Too much pressure, too heavy a flood and repeated passes will cause the image contrast to go through the roof due to dot gain.

Hi everyone, I'm pretty new to screen printing and would like to ask a few questions. I'm trying to do a 2 color halftone screen printing but it doesn't go well, the shades cannot be printed out accurately.

Here's the details of my work:

- the 2 screens were burnied seperately (240 dpi, 35 lpi, 30 and 60 degree)

- screen mesh count 150

- water based ink printed on 100% cotton fabric

So where's the problem I've done wrong? Thanks for your advice!

 

[veeeeeee]

How does the screen itself look? Are the dots clearly exposed, no unwanted washout?

Also, how are you doing the actual print? Halftones demand you really have your squeegee technique down. Too much pressure, too heavy a flood and repeated passes will cause the image contrast to go through the roof due to dot gain.

The second picture is the screen burned and it goes quite well.

I tried passing once and twice when printing and they both got flooded.

 

[cookiesa]

Which brand of waterbased? I have found some are very thin, can make half tones very difficult. A thicker one will generally work better. If it is a one off or small run you could put some ink on the mesh and allow it to thicken up a bit before printing