Timstar - Science

Cobalt chloride free humidity indicator paper does not contain carcinogenic or toxic material. There is a clear colour change from yellow-green to pale to colourless at approximately 2% Humidity indicator paper traditionally contains cobalt chloride which is known for it’s toxic and carcinogenic properties Handling these indicator papers puts end users and those involved with packing them at risk This non-toxic moisture indicator paper disqualifies this risk being safer to use

Cobalt Chloride Test Paper can quickly and economically measure the presence of relative humidity in the atmosphere. The paper is directly exposed to the atmosphere and turns from blue to pink upon contact with relative humidity greater than 2%. These papers are traditionally used in school experiments. Supplied in books of 20 strips.

Johnson Test Papers Litmus Blue Paper, pH paper. Supplied in books of 20 strips.

Johnson Test Papers Litmus blue paper, pH paper. Supplied in books of 20 strips.

Johnson Test Papers Litmus neutral paper, pH paper - for use in education. Supplied in books of 20 strips.

Johnson Test Papers Litmus red paper, pH paper - for use in education. Supplied in books of 20 strips.

Johnson Test Papers Litmus red paper, pH paper - for use in education. Supplied in books of 20 strips.

Johnson Test Papers Universal Indicator Paper pH 1 - 11, pH paper - for use in education. Supplied in books of 20 strips.

Johnson Test Papers Universal Indicator Paper pH 1 - 11, pH paper - for use in education. Supplied in books of 20 strips.

Johnson Test Papers Universal Indicator Paper pH 1 - 14, pH paper - for use in education. Supplied in books of 20 strips.

Johnson Test Papers Universal Indicator Paper pH 1 - 14, pH paper - for use in education. Supplied in books of 20 strips.

Johnson Test Papers Litmus Blue Paper, pH paper- for use in education,and industrial. 1 reel (5m x 7mm).

Johnson Test Papers Litmus Red Paper, pH paper- for use in education,and industrial. 1 reel (5m x 7mm).

Johnson Test Papers Universal Indicator Paper pH 1 - 11, pH paper- for use in education,and industrial. 1 reel (5m x 7mm).

Johnson Test Papers Universal Indicator Paper pH 1 - 14, pH paper- for use in education,and industrial. 1 reel (5m x 7mm).

Borosilicate 3.3 test tubes, medium wall, with rim.

Borosilicate 3.3 test tubes, medium wall, with rim.

Borosilicate 3.3 test tubes, medium wall, with rim.

Borosilicate 3.3 test tubes, medium wall, with rim.

Borosilicate 3.3 test tubes, medium wall, with rim.

Medium wall, with rim.

Medium wall, with rim.

Medium wall, with rim.

Medium wall, with rim.

Medium wall, with rim.

Medium wall, with rim.

Medium wall, with rim.

Heavy wall, with rim.

Heavy wall, with rim.

Heavy wall, with rim.

Heavy wall, with rim.

Medium wall, with rim.

Medium wall, with rim.

Medium wall, with rim.

Medium wall, with rim.

Medium wall, with rim.

Medium wall, with rim.

Medium wall, with rim.

Medium wall, with rim.

Medium wall, with rim.

Medium wall, rimless.

Medium wall, rimless.

Medium wall, rimless.

Medium wall, rimless.

Medium wall, rimless.

Medium wall, with rim.

Medium wall, with rim.

Medium wall, with rim.

Medium wall, rimless.

Medium wall, rimless.