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Pigment Yellow Series
Pigment Red Series
Pigment Red 122
Pigment Orange 13
Pigment Beta Blue 15:3
Pigment Green 7
Pigment Violet 19
Pigment Violet 23
Other Product
 
  Test method of Copper Chloride
  Test method of Copper Chloride, Insoluble
  Test method of Copper Chloride Anhydrous

OIL ABSORPTION
Weight accurately about 5g. of organic or 10g. inorganic pigment. The sample is placed on a glass or marble plate. Linseed oil ( Acid Refined Linseed oil conforming to IS :75-1973 having an acid value equal to 4-8) is then added slowly, 4 to 5 deops at a time from burette & rubbed into pigment with palette knife. This addition is continued until agglomerates of oil and pigment are formed and form this point, oil is added only one drop at a time followed by a thorough rubbing with a papalette knife. The paste will be such that it will just sparead without craking or curmbling.

By nothing the quantity of oil used, the oil absorption value is calculated and expressed as the greams of oil required 100g. of pigment.

BLEEDING IN SOLVENTS
Weight 0.5g. of pigment and 20ml of solvent in aconcial flask. Shake for 30 min. on a flask shaker.Filter the contents through whatman No.44 filter with Blanc Fixe bed. Observe the colour of filtrate and assess the dgree of bleeding on 1 to 5 scale.

Scale -1 Considerable bleeding Scale-5 No bleeding

REDISTANCE TO ACID & ALKALI
Stir 10g. of pigment and 500ml of HCL or NaOH ( 5% in case of organic and 1% in case of inorganic pigment ) in beaker for 1 hour. Filter and wash with water till Ph is neutral. Dry in an ovan, Mill and mix together with varnish on muller. Assess the shade difference on draw down between treated and untreated sample on 1 to 5 scale by using blue wool.

Scale 1- Considerable discolouration Scale 5- No discolouration.

SPECIFIC GRAVITY
Specific Gravity is tested as per IS : 3493-1978 (Method of sampling and test for Organic pigment for paints)
Weight an empty specific gravity bottle with lid (w1). fill with Kerosene and put the stopper and take weight (a). Again fill with water and put the stopper and take the weight. In a clean bottle weight 1-2g. of sample and weigh along with the lid (W2). Fill the bottle to 1/4th layer above the pigment with kerosene and place in a deciccator with lid. Connect to. The vacuum for 2 hrs. Take the bottle from deciccator and fill it completely with kerosene and weigh alongwith a stopper (c).

Specified gravity = b * s / (a+b)-c
Where :
b=W2 - W1=Weight of the pigment
s=Specific gravity of the Kerosene
a=Weight of the bottle+kerosene
c=Weigh of bottle + Kerosene + sample

PLASTICS

Fastness to heat

The maximum processing temperature is given based on 5 minutes exposure in an injection moulder cavity.
Fastness to Mirgration
Full shade PVC Sheet is placed between 2 pieces of white flexible PVC Sheets under a weight of 100g/cm for 1 hour at 120 C.
Migration is assessed on 1 to 5 scale.

Scale 1 - Heavy migration Scale 5- No migration

pH OF PIGMENT POWDER
Weight 10g. pigment in a 250 ml. beaker, add 5 ml. Of deionized water to wet the pigment. Make a paste with a glass road. Add 150ml. deionized water and boil for 5 minutes. Coll the mixture to room temperature. Filter through Whatman n o.5. Make the volume of filtrate to 250ml. in volumetric flask. Check the pH of filreate using glass and refence electrode.

MATTER SOLUBLE IN WATER (W.S)
Water soluble is tested as per IS : 3439-1978 ( Method of sampling and test for organic pigments for paints ). Weight 5g. of pigment. Add 10ml. of methanol and make a paste. add about 200 ml. of water and boil for 5 minutes. Cool to room temperature. Transfer it to 250ml. volumetric flask through blanc fixe bed. Take 100ml. of filtrate in a previously weighed 150 ml.beaker (W1). Evaporate the solution on a hot plate till dryness. Keep the beaker in an oven at 102+- 2'C for 1 hour.Cool in the desiccator to room temperature and reweigh the beaker (W2)., %

Water soluble matter = (W1-W2) * 250 / Wt. of the sample.

VOLATILE MATTER
Volatile matter is tested as per IS : 3493-1978 ( Mathod of sampling and test Organic pigment for paints) Weigh a clean, dry Petri-dish accurately on a balance (W1). Take 2-3g. sample in a weighed dish and reweighed it (W2). Keep it open in an oven in an oven at 102+/ C for 2 hrs. Cool in the desiccator and weigh it (W3).Repeat the procedure of drying , cooling and weighing till constant weigh is obtained.

%Volatile matter = (W2 - W3) * 100 / (W2- W1)

BULK DENSITY
About 10g. of orgainc pigment or 30 g. of inorgainic pigment is accurately weighed and transferred into a 50 ml. measuring cylinder. The cylinder is then fixed on Bulk Density apparatus and 50 strokes are given to the cylinder. Volume is noted. Bulk Density is expressed as the grams of the material per cc of its volume.

FASTNESS TO LIGHT
Depending on the major wnd application the product is recommended for i.e. paint, printing, inks, plastics, the light fastness is checked for that end application. The exhibits are exposed in QUV Accelerated weathering Tester and light fastness is assessed on 1 to 8 8 scale.
Scale 1- poor light Fatness Scale 8- Excellent light Fastness


PAINTS & COATINGS

Fastness to heat
Indicates the maximum recommended temperature, based on 20 minutes stoving in oven.
Fastness to overspray
Overspray the full shade specimen with white stoving enamel.Stove at 130° C for 20 minutes. Assess the degree of bleeding on 1 to 5 scale.

Scale 1 - Heavy bleeding Scale 5 - No bleeding
NOTE : THE INFORMATION PROVIDED IS BASED ON OUR PRESENT STATE OF KNOWLEDGE AND IS INTENDED TO PROVIDE GENERAL NOTES ON OUR PRODUCTS AND THEIR USES. IT SHOULD NOT THEREFORE BE CONSTRUED AS GUARANTEEING SPACIFIC PROPERTIES OF THE PRODUCTS DESCRIBED OF THEIR SUITABILITY FOR A PARTICULAR APPLICATION.

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