SHELLAC EPC

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

Special

A

B

C

D

2.0%

3.0%

3.0%

3.0%

5.0%

3.0%

4.0%

4.0%

4.0%

7.0%

8 max

10 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:16[Part-1]-1973)
HANDMADE SHELLAC

GRADE
ESSENTIAL REQUIREMENTS
OPTIONAL REQUIREMENTS

Matter insoluble in hot alcohol Colour Index Maximum Rosin & Orphiment Volatile matter Wax Ash % Max Matter soluble in water Max Flow Heat poly- meri-tation Acid lead value Iodine content value

Basic Limit Relaxed Limit

Special

A

B

C

D

E
0.75%

1.0%

1.25%

1.5%

2.5%

3.0%
1.0%

1.5%

2.0%

2.5%

3.5%

5.0% 06

12

15

18

25

30 Free from rosin and orpiment Not more than 2% Not more than 5.5% 0.5

0.5

0.8

1.0

1.0

1.0 0.5% As agreed between buyer & seller As agreed between buyer & seller at a temperature of 150° C As agreed between buyer & seller

Special Grade Grade A Grade B Grade C Grade D Grade E

Superior Kusmi
Button Lac
Special Kusmi
Lemon Shellac Lemon one Shellac pure one button Lac Light pure Button Lac Superior Lemon Shellac Lemon two Shellac Yellow orange Shellac Standard one Shellac Super fine Shellac Pure TN Shellac ITN Shellac

GRADE
ESSENTIAL REQUIREMENTS
OPTIONAL REQUIREMENTS

Matter insoluble in hot alcohol Maximum % Colour Index Maximum Rosin & Orphiment Volatile matter Wax Ash % Max Matter soluble in water Max Flow Heat poly- merisation Acid lead value Iodine content value

Type l-A

Type l-B

Type l-C

Type l-D

Type l-E

Type II-A

Type Il-B

Type lI-C

Type lI-D

Type lI-E

Type IIl-A

Type IIl-B

Type IIl-C

Type IIl-D

Type IV-A

Type IV-B

Type IV-C

Type IV-D
0.6%

0.6%

0.6%

0.6%

0.6%

0.3%

0.3%

0.3%

0.3%

0.3%

0.2%

0.2%

0.2%

0.2%

0.2%

0.2%

0.2%

0.2%

8

12

22

35

50

8

12

22

35

50

9

20

35

50

0.9

2.0

3.5

5.0
Normally free from Rosin and orpiment and except when a specified percentage is agreed between buyer and seller Not more than 2% Not more than 5.5% Not more than 0.3% Not more than 0.5% As agreed between buyer & seller As agreed between buyer & seller usually at a temperature of 150° C As agreed between buyer & seller

Type I -- product by heat process

Type II -- product by hot solvent process

Type III -- Dewaxed Shellac

Type IV -- Dewaxed and Decolourised Shellac

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 Free Cholrine 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