Re: Kremer Defoamer

Judy Seigel wrote:

>On Wed, 2 Mar 2005, Sandy King wrote:
>
>>If this product were used in a hot emulsion
>>would the silicon oil not float to the top of
>>the coated emulsion, assuming a gelatin
>>emulsion that is coated when warm and sets when
>>cool?
>>
>>Sandy
>
>
>Well Sandy, we're talking about ONE DROP in a
>litre, so the odds of "separating" seem slim.
>Meanwhile I suggest that you not BOIL your
>gelatin & you should be OK. (At least we were
>-- it made an enormous difference.)
>
>Judy

Hi there Judy,

Thanks for the information about your use of the
Kremer defoamer. I am going to pull out that
number of PF now and read what you have to say
about it. I had forgotten that you were the one
who originally recommend the product but now it
comes back to me.

I don't usually boil the gelatin when I make
carbon tissue, though I routinely heat it up to
about 130-40º F. What would be the advantages in
your opinion of boiling it? Do you think boiling
it will make the gelatin last longer in the
refrigerator? I am concerned that boiling it
might cause those little speckles you described
earlier! Got enough trouble with oil and bubbles
floating to the top of the tissue so sure would
like to avoid those nasty speckles!!

Sandy
Received on Wed Mar 2 22:00:29 2005