My opinion :

Don't put the bulbs to close the negative,  paint the inside ligth 
box in white and maybe put a white or ground glass (or special 
plastic paper, used in ligthing material, resisting to heat)  between 
the bulbs and the negative.
Hope that will help you.

Good luck,

Michel DUSARIEZ - Belgium
If you don't succeed at first , you are about normal !

>Hello Everyone,
>I have been building a 8x10 enlarger to go along with my 8x10 camera. I
>made the negative holder with two pieces of 1/4" glass. The glass slides
>into a holder that replaces the back of my camera.
>
>The light box I made out of 1/4" plywood, which houses 12 light sockets.
>I set up the camera and light box with 60 watt light bulbs just to see
>the image that it would project.
>
>My problem is what to use to defuse the light striking the negative. I
>have been trying to keep the cost of making this enlarger to a bare
>minimum. I may have to add 4 more bulbs to the light box to keep the
>light as even as possible in order to avoid hot spots on the projected
>image.  I have entertained the idea of using a piece of ground glass as
>a light defusing device.
>
>Does anyone have any ideas on what to use that won't cost a fortune.
>Phil McCourt
>
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-- 
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Michel DUSARIEZ
UNLIMITED FIELDS RESEARCH PANOPTIC IMAGING asbl
KITE AERIAL PHOTOGRAPHY WORLDWIDE ASSOCIATION - FOUNDATION
14, Avenue Capitaine PIRET
B-1150 BRUXELLES - BELGIUM
Fax 32 2 512 68 29
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