I am posting this message on behalf of John Berry so please reply directly
to John <[log in to unmask]>
Does anyone know of suppliers of non-toxic felt-tip pens suitable for paper
chromatography in which the ink colours will separate during solvent flow.
Many thanks, Sue.
--
Dr Sue Cavell, Head of Research and Evaluation
Techniquest, Stuart Street, Cardiff, UK. CF10 5BW
Tel: +44 (0) 29 20 475 475 ext 223
Fax: +44 (0) 29 20 482 517
Web: http://www.techniquest.org
Techniquest is a Company Limited by Guarantee,
registered in England and Wales, no. 1955696
It is a registered charity, no. 517722
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