Sale! Nitrate testing aid strip to be submerge in the emulsion and after approx. 30 seconds hold it up to the colour-coded comparison chart and read the results. The presence of nitrate ions is indicated by a change in colour to red. Brand:Ariana Type:Nitrate Te
Nitrate testing aid strip to be submerge in the emulsion and after approx. 30 seconds hold it up to the colour-coded comparison chart and read the results. The presence of nitrate ions is indicated by a change in colour to red.
Cost: $25
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