[Alt-photo] Re: lump gum

[Laura V]

I see, then I'll scratch that idea. Thanks!
Laura

On 10/19/13 6:52 PM, Peter Friedrichsen wrote:
> i tried thyme essential oil once but it did not work nearly as well as thymol. I discovered that there are many other components that dilute the actual thymol, such as terpenes etc...
>
> I did manage to buy 100g of pure thymol crystals from an aromatics supply store but this is in Canada. Price was about $8.00/100 g a couple of years ago...a lifetime supply.
>
> Peter Friedrichsen
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> On 2013-10-19, at 12:27 PM, Jorj Bauer <jorj at jorj.org> wrote:
>
>> Thyme oil might work. Don't know what impurities might come with it. The stuff at the drug store is generally just thymol in alcohol.
>>
>> Sent from my iPhone
>>
>> On Oct 19, 2013, at 12:00 PM, Laura V <laura at lavatop.com> wrote:
>>
>>> Oh I see, so maybe at the drug store. I didn't know what it was. I read that it is derived from thyme, so maybe thyme oil would work as well? Thanks!
>>>
>>> Laura
>>>
>>> On 10/19/13 3:46 PM, Jorj Bauer wrote:
>>>> Glyoxol is a hardener. You probably don't want to use that as a preservative for gum.
>>>>
>>>> Thymol should work. I'd be surprised if you couldn't find that; it's commonly used as an anti-fungal for finger- and toe-nails.
>>>>
>>>> -- Jorj
>>>>
>>>> On Oct 19, 2013, at 11:40 AM, Laura V <laura at lavatop.com> wrote:
>>>>
>>>>> Thanks for this. I have not used a preservative before (mainly because I don't know where to buy it). I usually just mixed a small batch (when I had the powdered stuff) and kept it in the fridge and used it within 2 weeks.
>>>>>
>>>>> Unless, is glyoxol a preservative? I have some that I used in paper sizing. It would be handier to always have the gum pre-mixed.
>>>>>
>>>>> Laura
>>>>>
>>>>> On 10/19/13 3:01 PM, Guido Ceuppens wrote:
>>>>>> Laura,
>>>>>>
>>>>>> I used the following procedure with lumps of gum:
>>>>>>
>>>>>> 300 grs of gum are slowly dissolved in 850 ml of cold water, this may take
>>>>>> several days. The impurities are then filtered or fished out, some
>>>>>> recommend to suspend the lumps of gum in a muslin bag to prevent the
>>>>>> impurities to float in the solution. Once dissolved a preservation agent
>>>>>> must be added to the solution: in the past I have added either 15 ml of
>>>>>> formol or 7.5 grs of sodium benzoate. I have used the thus prepared gum for
>>>>>> years without it going bad (I mainly use casein now but occasionally use
>>>>>> gum that was prepared from powder –same procedure- 7 years ago).
>>>>>>
>>>>>> Welcome back and good luck,
>>>>>>
>>>>>> Guido
>>>>>>
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