Re: exposure time

I would suggest about a 6% sensitizer for this negative, assuming
tray sensitizing with potassium dichromate. If spirit sensitizing try
4% ammonium dichromate 1:2 with acetone. Exposure times will vary
some according to gelatin type, percentage, pigment, etc. but with
this negative and light source the exposure should be on the short
side, 5 minutes or less I would imagine.

Sandy King

>I use the super actinic bulbs which are 2 1/2" above the contact
>printing frame and have a negative with a film base + fog of .07 and my
>highest textured value is 1.95 above fb+f. This will be my first attempt
>at carbon printing and could someone give me an approximate starting
>time for the first exposure.
>
>Thanks
>David
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