Scotch tape = pin holes

["Stan Patz" <skp113@xxxxxxxxxxx>]

>Scotch tape causes pin holes. If you apply and remove
>it to the emulsion side then you will get pinholes on
>your negatives. It is probably either due to the
>static electricity all scotch tape emits when it is
>peeled off a surface or because the tape actually
>picks off small pieces of the emuslion.

>I know most people think static electricity would
>cause dark spots, not pinholes, but empiracle evidence
>suggests otherwise.

>Perhaps the pin hole solution can be solved by simply
>spraying an anti-stactic spray on the backs and
>insides of cameras.


To Rolland and the group,

I have seen static electricity discharges on my sheet film and it looks like 
little black lightning bolts (on negs).

In my discussions with Dick Johnson at Kodak, he talked about a problem they 
had with HIE. Matte beads are placed in an overlying coating to keep another 
piece of film from abrading the emulsion. At one point in the manufacturing, 
these matte beads were migrating into the sensitized emulsion, causing the 
voids we call pinholes. Kodak has now corrected the problem.

It is possible that Scotch tape is binding to these tiny high spots and 
tearing pieces of the emulsion out on removal.

Stan Patz   NYC
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