I can't find the source I wanted.
>From Isabel Wingate, *Textile Fabrics and their Selection* sixth edition, 1970
>(it's an old text book)
<Effect of Acids
Acids, such as sulfuric, hydrochloric, and nitric, do not injure silks,
if they are dilute. Silk is more resistant to acids than are the vegetable
fibers, but concentrated acids destroy silk if it is soaked in them or if the
acids are allowed to remain on the silk for any length of time.
Formic acid and acetic acid have no injurious effect on silks. Oxalic,
tartaric, and citric acids are not injurious if they are removed promptly.>
In the back of the book is a list of various stains and methods of removing
them. Unfortunately you need to know what caused the stain.
HTH
Cynthia
On Feb 14, 2013, at 7:59 AM, J D Hammett wrote:
> But surely, vinegar is also acidic as well as lemon juice. I think I would
> rather avoid both as they would both work on the fibres. Nor would I take
> that much notice of what is being done in the dying industry. They are not
> particularly worried about the survival rates of their products, only to sell
> as much as possible.
>
> Joepie, East Sussex, UK
>
>
>
> From: Cynce Williams
>
> To: Alex Stillwell
>
>
> I think I remember something about lemon juice not rinsing out--like the
> enzymes--vinegar is much better for the final rinse
>
> Cynthia
>
>
> On Feb 14, 2013, at 3:17 AM, Alex Stillwell wrote:
>
>>
>>
>>
>> Thank you Robin. I agree. I would not even contemplate using enzyme based
>> products for treating silk. I think I will go along with your method David,
>> unless anyone come up with any problems. We'll wait until a sunny day, if
> we
>> have one this year. The final rinse sounds good too. I don't think lemon
> juice
>> would attack the silk. When it is manufactured silk is treated with acetic
>> acid to give it 'scroop', the feel you get when new silk fabric is rubbed
>> together in your hand, it is removed by washing.
>>
>> Happy lacemaking
>>
>> Alex
>
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