[Jewelry making - Article 00622] - [Orchid] Use of Hydrofluoric Acid in jewelry shops

[Martin Niemeijer]

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    Dear Bob Thank you for you assay on HF, It is nice to read a common
    sense and experienced article. Hf is very nasty and difficult to
    neutralise. For accidents I have some calciumgluconaat. 10% solution
    and gel . I do not now the English words for this so here the
    formula.  Ca ( OOC- CHOH - CHOH - CHOH - CHOH - CH2OH )2 seems to
    work on HF acids to neutralise. But I have never have to use it. Do
    you know if this stuff can get aged? or can it be used after years?
    If not so I need to buy some new. 

Greetings Martin Niemeijer Ndesign 
Cultuurwerkplaats R10
Rieteweg 10
8041 AK, Zwolle
The Netherlands
info AT ndesign.nl 
http://www.ndesign.nl
Phone +31 (0)38 7501258
Mobile phone +31 (0)651831576

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