Super Heat Sheild Help...

[Chaos is Born]

Ok, has anyone here had experiance with R1991? Roscos Super Heat sheild?

We got some in today and i am using it in our Source 4 750w 19, 26, and 50deg... the gel seems to be burning out just as fast as before if not faster though the tests that i have run...

Rosco sugjests having 1/2" space on either side of the heat sheild to allow for ample breathing room for the heat to be released.

test 1: Gel without sheild: burn out time 40 seconds

Test 2: Heat sheild in slot 1, gel in slot two: burn out time 30 seconds...

Test 3: Heat sheild and Gel in same slot: currently going on 5 mins with some color changes but no burns...

Any sugjestions?

Edit: Ok, after 10 mins of Test 3 i let the Gel cool down and then took a look at the damage, there were no complete burn throughs, only some spots where the color had disappeared and some color had transfered onto the heat sheild.

[icewolf08]

What unit are you testing this in? The 36˚ and 26˚ are notorious for having specific lens positions that cause the gel to burn up almost as soon as you put it in. You may have better luck changing the focus, or use color extenders. I had a problem with gel burning during hang for Les Mis two months ago, all it took was a few color extenders and all was good. If you don't have color extenders you can always tape the gel to the end of a top hat.

[Chaos is Born]

Testing is taking place in a 26 degree which is the unit that i will be using the colors in the most. I unfortunetly don't have any top hats... (don't ask why, i've only been here three weeks) but i have a whole bunch of half hats... And i don't have any color extenders either...

[Footer]

Originally Posted by Chaos is Born

Testing is taking place in a 26 degree which is the unit that i will be using the colors in the most. I unfortunetly don't have any top hats... (don't ask why, i've only been here three weeks) but i have a whole bunch of half hats... And i don't have any color extenders either...

check your bench, or tell the cheap person in charge to go but some color extenders.

[Sean]

You could also try Apollo Gel Shield. It isn't cheap at ~$40 per sheet, but worth it for scrollers and units that might be hard to reach.

We ended up buying a bunch, and taping it into spare gel frames with blacktak. We just keep using it until it ages too much.

With the Gel Shield, you MUST make sure the correct side faces the unit. You can tell by using a multimeter set to Ohms (Resistance). The side that faces the lamp is actually partly conductive. Not enough to give you continuity, but enough that you'll see it on the meter.


In a pinch you can also tape an oversized piece of gel to the front of the unit--you know, make a tent out of it. It will give you some more space between lamp and gel.

--Sean