Which side? It is perfectly clear.

dcarch · March 8, 2008

I have seen this question posted many times in many boards.

Greenhouse polycarbonate insulated panels are expensive. How can you tell which side is UV protected, if you get the panels mixed up?

I don't remember if anyone has a way to solve the problem. If you do, please share.

Here is what I have come up with:

1. Buy a "black light" (UV light). you can get one from $10 to $20. Or you can just buy the tube if you have a portable fluorescent light. Cheaper.

2. Steal some fabric whitener powder from your wife (or husband

).

3. Pour some whitener in the panel's cavities.

4. In a darken room, shine the black light on the panel. The clear side without the UV protection will be slightly brighter.

LED UV black light will not work very well becasue the wave length is not short enough.

dcarch

March 8, 2008	#1
dcarch Tomatovillian™ Join Date: Jun 2006 Location: NY Posts: 2,618	Which side? It is perfectly clear. I have seen this question posted many times in many boards. Greenhouse polycarbonate insulated panels are expensive. How can you tell which side is UV protected, if you get the panels mixed up? I don't remember if anyone has a way to solve the problem. If you do, please share. Here is what I have come up with: 1. Buy a "black light" (UV light). you can get one from $10 to $20. Or you can just buy the tube if you have a portable fluorescent light. Cheaper. 2. Steal some fabric whitener powder from your wife (or husband ). 3. Pour some whitener in the panel's cavities. 4. In a darken room, shine the black light on the panel. The clear side without the UV protection will be slightly brighter. LED UV black light will not work very well becasue the wave length is not short enough. dcarch __________________ tomatomatomatomatomatomatomatomatomatomatomatomato matomato tomatomatomatomatomatomatomatomatomatomatomatomato matomato tomatomatomatomatomatomatomatomatomatomatomatomato matomato