Multi-layer of decorative faceted fashion jewellery stones for technical use
AssigneePreciosa, a.s.
InventorsPavel Stok, Pavel Zadrazil, Petr Franc, Martin Novotny, Stanislava Stará
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Abstract
A final layer of a multi-layer of thin deposit and lacquer layers of a decorative faceted functional stone formed by 10 to 35% of nano/colloidal silica, optionally nano/colloidal alumina, 30 to 50% of encapsulated aluminium flakes in grain size of 15-80 μm, 2 to 10% of Fe3O4 in grain size of 3-50 μm, and 10 to 40% of polyisocyanate-hardened mixture of epoxy and polyether resin, and a method for increasing the opacity and hardness of a multi-layer of thin deposit and lacquer layers of a decorative faceted functional stone by applying this final layer.
Claims14
A method of increasing the opacity of a multi-layer of thin deposit and lacquer layers of a decorative faceted functional stone characterised in that a final layer formed by 10 to 35% of nano/colloidal silica or nano/colloidal alumina, 30 to 50% of encapsulated aluminium flakes in grain size of 15-80 μm, 2 to 10% of Fe3O4 in grain size of 3-50 μm, and 10 to 40% of polyisocyanate-hardened mixture of epoxy and polyether resin is applied to the back side of the functional decorative stone as the final layer of the multi-layer consisting of a thin reflective layer and covering lacquer layers either directly to the thin reflective layers, or to a previous lacquer layer, the multi-layer having a thickness from 4 μm to 20 μm.
A method of increasing the hardness of a multi-layer of thin deposit and lacquer layers of a decorative faceted functional stone characterised in that a final layer formed by 10 to 35% of nano/colloidal silica or nano/colloidal alumina, 30 to 50% of encapsulated aluminium flakes in grain size of 15-80 μm, 2 to 10% of Fe3O4 in grain size of 3-50 μm, and 10 to 40% of polyisocyanate-hardened mixture of epoxy and polyether resin is applied to the back side of the functional decorative stone as the final layer of the multi-layer consisting of a thin reflective layer and covering lacquer layers, the multi-layer having a thickness from 4 μm to 20 μm.
Dependencies are inferred from the claim text.