Puretch Photopolymer Space Bag Vacuum Exposure for Photo Etching Demo #2

[revaz39]

Thanks for reply!

I am a newbie so please excuse me if my questions seem too naive.

As a beginner I am going to start with space bag ( since it`s more affordable).

Do this undercut lightest dots cause significant loss of detail?

Is it possible that these undercut dots were created by the tendency of the space bag`s film to scatter light?

[revaz39]

Hi!

Great video, thank for sharing!

Could you please explain why space bags cause some loss of detail in highlights?

Is it because space bags are not as transparent as it`s necessary?

Thanks in advance !

[capefearpress]

@revaz39 The spacebag can not hold as tight of a vacuum as a professional contact frame exposing unit. Therefore the lightest dots may get undercut a bit and do not etch. This is my observation in testing. I could lighten up on exposure to see if that helps some.

[capefearpress]

The glass stays fixed to the unit.

[capefearpress]

The glass should stay on for safety. It also filters a little UV so if you decide to expose or test without it it's entirely up to you.

[nicksambrato]

do you remove the glass from the front of the work light?