Re: Gum Preservatives

[sam wang <stwang@bellsouth.net>]

Hi Loris,

There are many preservatives that can be used. Judy suggested  
formaldehyde. Thymol works well enough for me except when I put in  
too little - I wanted to put in a minimum amount. The smelly gum  
printed fine, maybe even better than fresh. I hope you didn't throw  
out your spoiled gum.

Anyone interested in making  Smellotypes? Odorgrams?

By the way, Sandy showed me the schedule of events for the Istanbul  
photofest. Very impressive!

Sam


On Dec 6, 2006, at 1:27 AM, Loris Medici wrote:

> Yes, I'm sure that this works perfectly (IIRC, Christina Anderson and
> David Hatton - and probably many other gum printers around - also use
> pure Thymol to preserve gum). Probably other impurities in thyme water
> caused my gum go bad. I probably would use Thymol if I could locate it
> easily but, in my case Sodium Benzoate was obtainable more easily  
> and it
> was cheaper than pure Thymol crystals.
>
> Regards,
> Loris.