UV Transmission.... - Growing in Greenhouses - International Cannagraphic Magazine Forums

CarpeLibertatem · 05-31-2010, 05:52 AM

Hey all, wondering if anyone has any solid info about different greenhouse coverings and their uv transmission properties. There are many different coverings used out there but solid specs on them are sometimes hard to find.

From all that I have read, the most uv transparent material is pure quartz glass(like 100% transmission) which is prohibitively expensive. I've also read that teflon can have a very high transmission of uv depending on how it's made.

So what covering material is best for full spectrum transmission with or without light diffusion?
Direct light is best. Do all materials diffuse light or only opaque ones?

Any thoughts?

Krull · 05-31-2010, 08:07 PM

I'm sincerely happy to trade some uv loss with all the great GH advantages, lots of people ask me about uv loss but i'm not worried. GH buds are pretty good, you don't need expensive stuff at all if you're not doin commercial / very big scale.

mate

=K

Jellinator · 06-21-2010, 01:41 AM

I covered mine in polycarbonate and solar soft the poly lets in 85% of light and solar soft 90% the poly carboanate is 6 mm and had good insulating qualities!!!

Me2 · 06-21-2010, 09:17 AM

I use a "uv open" poly on my greenhouse, it allows wavelengths from 300 – 399 nms to pass through.

CarpeLibertatem · 06-26-2010, 06:12 AM

Just an update if anyone is interested....

Acrylic that is made for tanning beds allows the most uv to pass through....i think it transmits like 80% uv.

05-31-2010, 05:52 AM	#1
CarpeLibertatem Member Join Date: Sep 2009 Location: United Police States of America Posts: 66	UV Transmission.... Hey all, wondering if anyone has any solid info about different greenhouse coverings and their uv transmission properties. There are many different coverings used out there but solid specs on them are sometimes hard to find. From all that I have read, the most uv transparent material is pure quartz glass(like 100% transmission) which is prohibitively expensive. I've also read that teflon can have a very high transmission of uv depending on how it's made. So what covering material is best for full spectrum transmission with or without light diffusion? Direct light is best. Do all materials diffuse light or only opaque ones? Any thoughts?
	Quote

05-31-2010, 08:07 PM	#2
Krull Soul Feeder Join Date: Apr 2009 Location: Underground Posts: 2,359	I'm sincerely happy to trade some uv loss with all the great GH advantages, lots of people ask me about uv loss but i'm not worried. GH buds are pretty good, you don't need expensive stuff at all if you're not doin commercial / very big scale. mate =K __________________ Don't judge each day by the harvest you reap but by the seeds that you plant.
	Quote

06-21-2010, 01:41 AM	#3
Jellinator Overgrown Join Date: Oct 2009 Location: Central Cal. Posts: 119	I covered mine in polycarbonate and solar soft the poly lets in 85% of light and solar soft 90% the poly carboanate is 6 mm and had good insulating qualities!!!
	Quote 1 members found this post helpful.

06-21-2010, 09:17 AM	#4
Me2 Member Join Date: Mar 2007 Posts: 233	I use a "uv open" poly on my greenhouse, it allows wavelengths from 300 – 399 nms to pass through.
	Quote

06-26-2010, 06:12 AM	#5
CarpeLibertatem Member Join Date: Sep 2009 Location: United Police States of America Posts: 66	Just an update if anyone is interested.... Acrylic that is made for tanning beds allows the most uv to pass through....i think it transmits like 80% uv.
	Quote