pH paper is used in the chemical vat & in woad extraction to measure alkalinity or acidity. This is Universal pH paper (pH 1 to pH 11) supplied as a book of 20 strips; each strip is 1 cm wide by 6.5 cm long and is used once only. Each book has a colour comparison pH chart.
The pH paper book is packed in a polythene bag, placed in a small padded envelope and posted to you First Class.
Price
£1.35
Delivery Worldwide
Postage £3.50p on orders up to £30 in value, free over £30 worldwide
