ASTM D1199-86(R2020) pdf free download

ASTM D1199-86(R2020) pdf free download.Standard Specification for Calcium Carbonate Pigments
3. Composition and Properties
3.1 The pigment may be prepared by chemical precipitation or by the fine grinding of natural calcium carbonate containing minerals. If additional agents are used or any surface treatment is given, their purpose shall be indicated; acceptance shall be as agreed upon by the purchaser and the seller. 3.2 Composition—The pigment shall conform to the re- quirements for composition prescribed in Table 1. 3.3 Fineness—The pigment shall conform to the following general requirements for fineness for the grade specified: 3.3.1 Grade I (Fine Paint Grade)—This grade possesses substantial amounts of material in the fine sizes, and is in general essentially below 15 to 20 µm maximum size. Coarse particles retained on the No. 325 (45-µm) sieve shall be less than 0.05 %. The maximum Specific Surface Diameter (SSD) shall be 2.5 µm. 3.3.2 Grade II (Coarse Paint Grade)—This grade is char- acterized by substantial amounts in the 5- to 45-µm range, and is lower in pigment value than Grade I. Coarse particles retained on the No. 325 (45-µm) sieve shall be less than 0.5 %. The maximum SSD shall be 6 µm. 3.3.3 Grade III (Filler Grade)—This grade is characterized by substantial amounts in the 10- to 45-µm range but with the coarse particles retained on No. 325 (45-µm) sieve less than 25 % and a maximum SSD of 9 µm. 3.3.4 Grade IV (Putty Powder Grade)—This grade pos- sesses less fines, and have substantial amounts of coarse particles. The coarse particles, however, shall not exceed 30 % retained on the No. 200 (75-µm) sieve. The maximum SSD shall be 12 µm. 3.3.5 Grade V(Superfine Grade)—This grade is a superfine ground natural limestone and is characterized by major amounts less than 5 µm and a weight median particle size in the range of 1 µm. The SSD is finer than 1 µm. 3.3.5.1 Particle size methods for Grade V that are applicable include transmission electron microscopy, scanning electron microscopy, and the Sedigraph. 4 Specific Surface Diameter can be determined by BET nitrogen absorption. The method of measurement produces different values, therefore, the method of measurement shall be agreed upon by the purchaser and the seller. 3.3.6 Grade VI(Ultrafine Grade)—This grade is an ultrafine precipitated calcium carbonate and is characterized by major amounts less than 2 µm and a median particle diameter determined by electron microscopy in the range of 0.05 µm. 3.3.6.1 Particle size methods for Grade VI that are appli- cable include transmission electron microscopy and scanning electron microscopy. The Sedigraph will give weight median particle size values approximately 10 times greater (;0.5 µm) than by microscopy. Since the method of measurement pro- duces different values, the method of measurement shall be agreed upon by the purchaser and the seller. 3.3.7 When closer control within a grade is required, the fineness requirements shall be as agreed upon by the purchaser and the seller. 3.4 Dry Brightness or Dispersed Color—The dry brightness or dispersed color shall be equal, within agreed upon tolerances, to that of a reference sample agreed upon by the purchaser and the seller. 3.5 Oil Absorption—Oil absorption values shall be as agreed upon by the purchaser and the seller.
4. Sampling
4.1 Two samples, each more than 1 lb (0.45 kg) shall be taken at random from different packages from each lot, batch, day’s pack, or other unit of production in a shipment. When no markings distinguishing between units of production appear, samples shall be taken from different packages in the ratio of two samples for each 5000 kg (10 000 lb), except that for shipments ofless than 10 000 lb two samples shall be taken. At the option of the purchaser, the samples may be tested separately, or after blending, in equal quantities, the samples from the same production unit forming a composite sample. Before testing, each of the samples shall be split, and one half of each may be sealed for referee testing.