This research project aims to study the effects of ion of that transition into the glass. Index refraction formula high glass preparation (64.99-x) SiO2: 10CaO: 25Na2O: 0.01 cent xA: CoO by the mole when A transition is as follows: Fe2O3, Cr2O3, CuO, NiO, and MnO2, where x is the volume concentration of a transition element. From the experimental results showed that the density of glass between 2.5312-2.6130 grams per cubic centimeter. Index of refraction of glass between 1.4983 – 1.5366 suck up light and color have different values depending on the type of the elements that are more sunny transit into the glass lyrics. By the color intensity of the glass volume will increase the intensity of that transit the sun filled into. This is consistent with the color values that are read from the measure in a CIE L * system * b * and found no clear relationship between hardness of glass with the concentration of copper oxide.
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