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| ULTRAMARINE
BLUE: |
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| Colour
Index |
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Pigment
Blue 29 CI 77007 |
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| Composition |
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Ultramarine
Blue is a Sulphured Sodium Silicate.
Typical Formula is - (Na2O)x (SiO2)y
(Al2O3)z Sw
x, y, z and w vary according to the type of blue |
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| Shades |
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Reddish
blue is very distinctive. Other shades may go from the darker reddish
shades to the lighter greener one. |
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| Toxicity |
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It
is a non toxic material and can be used for the colouring of materials
that comes in contact with food material. |
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| BASIC
CHARACTERISTCS |
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Laundry
Grade |
Industrial
Grade |
| Tinting
Strength |
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55-65
Reckitt's |
100-125
Reckitt's |
| Specific
Gravity approx. |
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2.35 |
2.35 |
| Oil
Absorption (ml/g) |
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30-35%
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40-45%
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| Moisture
Content (% max) |
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1.0% |
<1.0% |
| Sieve
residue 63 micron |
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0.8%
max. |
5
micron 1.0% |
| Matter
soluble in water |
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1.5%
max. |
1.0%
max. |
| Resistance
to heat |
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1
(Poor) |
(Poor) |
| Alkali
fastness |
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2
- 3 (Good) |
2
- 3 (Good) |
| Light
fastness |
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8
(Excellent) |
8
(Excellent) |
| Soluble
organic matter |
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Absent |
Absent |
| Handling |
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| In
their industrial usage, the recommended procedures for handling
non-toxic dusts must be followed. |
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| In
their industrial usage, the recommended procedures for handling
non-toxic dusts must be followed. |
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