From: Dave Rose (cactuscowboy@attbi.com)
Date: 01/29/03-04:33:23 PM Z
I'd recommend using Kodak Farmers Reducer R-4a or R-4b. Applied carefully
with a small brush, it is possible to reduce small localised areas.
Dave in Wyoming
> Neil Miller wrote:
> -----------
> Hello all - after all the wonderful help I received fom this group with a
> previous problem, I thought I'd try you with another. I am looking for
> something to reduce negative density i.e., to reduce the thickness of the
> emulsion layer on sheet film.
>
> I have tried jewellers rouge on the end of a cotton bud and with lighter
> fluid as a medium, but have had no luck. It just seems to polish the
> emulsion (after prolonged rubbing) without really removing any of the
> gelatin layer - it just seems too fine. I tried metal polish, too, with
> marginally better results: it bites into the emulsion, but I have to
polish
> for such a long time and with such a force that I lose control over the
area
> of emulsion which I am trying to reduce.
>
> I have also tried a very sharp exacto knife, but instead of "shaving off"
> very thin layers it just removes all the emulsion right down to the film
> base or it leaves darker "stress" marks.
>
> The reason I am trying to this? To subtly retouch/remove small
> blemishes/cliche verre.
> ------------------
>
> Well you can try value grinding compound from your local auto parts supply
> house. That should be much more course than jewelers rouge. The exacto
> knife does work - that's what I used when I was etching negatives. The
trick
> is to be very gentle. The weight of the knife alone should be enough to
> scrape away the emulsion. This should work with TX, HP5 and such - no
> guarantees with thin super hard films like TMY.
>
> Good luck,
> John Roseborough
> www.pyro4Hire.com
>
>
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