Bologna Stone "Pies" - UVc

 

FOV: 4" wide

 

Experiments in recreating the Bologna Stone, one of the first synthetically made phosphors made by heating barite from near Bologna, Italy.

 

These "pies" were made by combining BaSO4 with flour and sugar (and CuCl2*2H2O as activator). Water was added and the mixture was baked until dark. This was then and heated with a MAPP gas torch until it glowed bluish white.

 

Contains:

BaS:Cu+ (FL+PHOS! Yellow Orange >UVabc)

 

Shown under UVc light.

 

Key:

WL = White light (halogen + LED)

FL = Fluoresces

PHOS = Phosporescent

UVa = 368nm (LW), UVb = 311nm (MW), UVc = 254nm (SW)

'>' = "stimulated by:", '!' = "bright", '~' = "dim"

 

..\FL min Experiments\Group II Sulfides\BaSO4 with flour and sugar\Pies

 

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18 Watt Triple Output UV lamp from Polman Minerals - Way Too Cool UV lamps

Done