Full Version: cannot blast thru rapid mask 3000

From: RALLYGUY (RALLYGUY1) [#15]
 21 Aug 2006
To: Peter [#5] Unread

A UV safe environment doesnt have to be dark. They sell yellow light covers that block uv from fluorescent lights. We use these in our screen exposure room (similar process and chemistry as resist materials).

This may be the ticket, if you're having over exposure issues.

One way to test is to take a coin and a fresh unexposed section of material. Immidiately place the coin on the sheet and leave out for an estimated amount of time that you would be working with the materials. Apply to product and try to blast the material. If you are able to blast the coin shape properly, it is likely that you are exposing the material too much while processing, and need either shorter processing times or better UV control.

If it acts the same, you are having other issues...one of which could be bad material, or as someone else mentioned, you may not be removing the liner properly. This liner if left intact would protect the resist from blasting, and could theoreticaly act the same.

Hope this helps......


From: RALLYGUY (RALLYGUY1) [#16]
 21 Aug 2006
To: RALLYGUY (RALLYGUY1) [#15] 21 Aug 2006

I see you resolved the issue....Glad to hear it.

From: UCONN Dave & Lynn too (DANDL48) [#17]
 22 Aug 2006
To: RALLYGUY (RALLYGUY1) [#15] 22 Aug 2006

Brian,

Where do you get the UV covers?

Thanks,
Dave

From: RALLYGUY (RALLYGUY1) [#18]
 22 Aug 2006
To: UCONN Dave & Lynn too (DANDL48) [#17] 22 Aug 2006

I believe Midwest Sign and Screen has them....Any Screen printing supply company should have something like this.


http://www.midwestsignandscreen.com/index.html

Looks like they have a location in your region...... :) 

EDITED: 22 Aug 2006 by RALLYGUY1


From: Engravin' Dave (DATAKES) [#19]
 22 Aug 2006
To: UCONN Dave & Lynn too (DANDL48) [#17] 22 Aug 2006

Dave,

If you light fixtures with lenses you can get UV blocking film at any hardware store and cut it to cover the lens. It is usually with the other tinting films.

After cutting to size, just open the light fixture set the film in place, then close the fixture. You are good to go.


From: RALLYGUY (RALLYGUY1) [#20]
 22 Aug 2006
To: Engravin' Dave (DATAKES) [#19] 22 Aug 2006

That is also a good option.....We used to use exactly that, but the films do age and need to be replaced over time....when it was time to replace, we bought snap on covers for the bulbs.

From: UCONN Dave & Lynn too (DANDL48) [#21]
 22 Aug 2006
To: RALLYGUY (RALLYGUY1) [#18] 22 Aug 2006

Brian and David,

Thank you both!!
Dave

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