Research & Development

RESEARCH SPECIFICATION

ISI SPECIFICATIONS (IS:15-1973) SEEDLAC

 

GRADE ESSENTIAL REQUIREMENTS OPTIONAL REQUIREMENTS
Matter insoluble in hot alcohol Colour Index Volatile matter Bleach Index Matter soluble in water Ash Particle size Wax
Basic Limit Relaxed Limit
SpecialA

B

C

D

2.0%3.0%

3.0%

3.0%

5.0%

3.0%4.0%

4.0%

4.0%

7.0%

8 max10 max

12 max

18 max

30 max

2.5%2.5%

2.5%

2.5%

2.5%

As agreed between buyer & seller 1%1%

1%

1%

1%

As agreed between buyer & seller Not more than 20% passing through 600 micron is Sieve an not more than 5% through 425 micron sieve Not more than 5.5%
Special Grade A Grade B Grade C Grade D
Golden Kusmi Seedlac
Golden Bysacky Seedlac
Kusmi one Seedlac Manbhum Fine Bysacky Seedlac Fine Bysacky Seedlac Genuine Bysacky Seedlac

 

ISI SPECIFICATIONS (IS:17-1973)
BLEACHED LAC

GRADE ESSENTIAL REQUIREMENTS OPTIONAL REQUIREMENTS
Matter soluble in hot alcohol Colour Moisture Wax Max Ash by mass Rosin & copals Matter soluble in water Total     Acid    Mineral     FreeCholrine   Value    Acid    Chlorine
As agreed between buyer & seller As agreed between buyer & seller case of Bonedry Bleached Lac Max 6% 0.2%5.5% 0.5%1% Nil 0.3%1% As agreed between buyer & seller

 

BUREAU OF INDIAN STANDARDS SPECIFICATION (Doc: CHD 22 [9281]-c1989)*

LAC DYE

SL. No. CHARACTERISTICS REQUIREMENTS
1. Melting point,0C, MAX. 230 (with charring)
2. Volatile matter at 1350C, percent by, mass 0.1
3. Ash content, percent by mass, MAX. 0.7
4. Cold water insoluble matter, percent by mass, MAX. 52
5. Hot water insoluble matter, percent by mass, MAX. 10
6. Hot alcohol insoluble matter, percent by mass, MAX. 1
7. Acid Value, MAX 234—-245
8. Dye content, percent by mass, MIN. 90
9. UV —Visible absorption spectrum, MAX. 230, 292, 340, 500 and 530 nm

* Draft Stage