The present application relates to a kind of preparation methods of amber glass, it is characterized in that: (1) composite colorant is prepared according to the following mole percentage: 0.06-0.07% Fe2O3, 0.01-0.05% iron
silicate, 0.23-0.62% Na2SO4, 0.01-0.24% NH4HSO4, 0.25-2.6% high-purity
graphite powder, the rest is
anhydrous ethanol;(2) after the batch is placed into oven and dried, it is filled into
platinum crucible and is melted, 1450-1520 ℃ is kept for 0.5-1.5 h;(3)
copper plate of glass
casting is preheated, and the glass liquid that is melted and clarified is taken out from high-temperature furnace, and is cast on the
copper plate that is preheated;(4) the glass that is cast is placed into annealing furnace, then with furnace cooling to
room temperature, and amber glass is prepared.The present application has the following advantages: the composite colorant of the present application can strictly control Fe 2+ / Fe 3+ As 1.76-2.25, can greatly improve the uniformity of coloring, stability;The visible light
transmittance of the glass of the present application is ≤35%, 10-300 nm
transmittance is 0, greatly improve the performance of
ultraviolet resistance;
Viscosity is lower during melting process, beneficial to glass packaging vessel forming.