General Conditions
  1.523 Optical White Lens
  Blanks
  Flint Buttons for Bifocal
  Lenses
  Sunlens Blanks
  1.7 Hi-index Lens Blanks
  1.8 Hi-index Lens Blanks
  1.9 Hi-index Lens Blanks
  Photochromic Grey Lens
  Blanks
  Photochromic Brown Lens
  Blanks
  Mold Glass
 
 Flint Buttons for Bifocal Lenses
 
Refraction index Nd=1.654
Density 3.85 g/cm3
Abbe value 37
Strain Point 454oC
Annealing Point 480oC
Softening Point 518oC
Linear thermal expansion coefficient (20-300oC) 96.9x10-7 /oC
White round-shape flint buttons available
 
White 1.654 Flint Button USD/Pair
Code Dia.
(mm)
Curve C. Thick.
(mm)
Curve Radius (mm) Price
CVX ( + ) CCV ( - ) CVX ( + ) CCV ( - )
F628000000035 28 0.00 0.00 3.6 0 0 0.140
F628000000040 28 0.00 0.00 4.0 0 0 0.160
F630000000035 30 0.00 0.00 3.6 0 0 0.160
F630000000040 30 0.00 0.00 4.0 0 0 0.180
F633000000035 33 0.00 0.00 3.6 0 0 0.180
F633000000040 33 0.00 0.00 4.0 0 0 0.210
 
Photochromic Flint 1.654 Button USD/Pair
Code Dia.
(mm)
Curve C. Thick.
(mm)
Curve Radius (mm) Price
CVX ( + ) CCV ( - ) CVX ( + ) CCV ( - )
F830000000038 30 0.00 0.00 3.8 0 0 0.300
F835000000040 35 0.00 0.00 4.0 0 0 0.350
 
 
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