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It does not itch or pill
and relaxing
Royal Blue
* This ink should not be used in refillable pens
La chimie des cristaux BTS-DESSIN It does not itch orWith two 120 g bags of monoammonium phosphate, this kit allows you to grow crystals approximately 5 cm long, so beautiful that you will be happy to keep them as precious additions to your mineral collection . The crystals will be blue, yellow, green, or transparent. Thanks to the two experiments included, children will understand that it takes very little to change the crystallization process, as no two crystals are alike.
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