The 1994 edition of IS 852 outlines the specifications and testing procedures for animal-based adhesives intended for general woodworking use. It details the composition, physical and chemical characteristics, sampling techniques, and performance benchmarks including moisture content, storage stability, and bonding strength. This standard is crucial for producers, distributors, and quality inspectors handling animal glue for wood assembly.
Overview
The 1994 edition of IS 852 outlines the specifications and testing procedures for animal-based adhesives intended for general woodworking use. It details the composition, physical and chemical characteristics, sampling techniques, and performance benchmarks including moisture content, storage stability, and bonding strength. This standard is crucial for producers, distributors, and quality inspectors handling animal glue for wood assembly.
Audience
Contents
Structure
Frequently Asked
IS 852 (1994) specifies animal glue produced from skin or bone materials in various forms suitable for woodworking. These include sheets, cakes, granules, pearls, flakes, powder, and kibbled forms, all supplied according to purchaser requirements to accommodate diverse woodworking applications.
In accordance with IS 852 (Annex C, Clauses 2.1 and 3.5.1), moisture content is measured by first breaking the glue and passing it through a 2.00 mm IS sieve. A 1 g sample of powdered glue is weighed into a tared stainless steel dish, then soaked with 10 ml distilled water and dissolved using a water bath. After partial evaporation on the water bath, the sample is dried in an oven at 103 ± 2°C for 2 hours. It is cooled in a desiccator, weighed, reheated for 30 minutes, and weighed again until the weight change is ≤1 mg. Moisture is calculated as the percentage loss in mass relative to the original mass, with average moisture content limits of 14% and maximum individual value of 18%.
IS 852 mandates that animal glue must be stored in a cool, dry environment to maintain its integrity for a minimum of 12 months from manufacture. The glue’s keeping quality is verified through tests (Annex B) ensuring it remains free from liquefaction, putrefaction, or mold growth for at least six days. The glue is derived from skin or bone and supplied in various forms including sheets, cakes, granules, pearls, flakes, powder, and kibbled formats.
Under IS 852 (Clause 3.8 and Annex F), six overlap joint specimens are prepared and subjected to longitudinal shear tests using a machine that restricts bending. The glue must be tacky before assembly, and the joint must be closed within 15 minutes of glue application. Clamping pressure of approximately 50 kg is applied for 16 to 24 hours at room temperature, followed by an air-dry period of at least 24 hours before testing. The average failure load of these specimens should be at least 275 kg to pass the test.
Per IS 852 Clause 7.1, every bag of animal glue must be clearly and permanently marked with the manufacturer’s name or location, a description of the glue type or form, the year of manufacture, and the batch number. Packaging (Clause 5) typically involves suitable quantities agreed upon by purchaser and supplier, often utilizing gunny bags lined with alkathene to ensure protection. The glue may be supplied in various forms such as sheets, cakes, granules, flakes, pearls, powder, or kibbled forms to facilitate handling and storage.
Ask AI about any clause, requirement, or provision in IS 852. Get instant, clause-cited responses powered by our indexed library.
Free tier includes 150 queries (50 AI + 100 Reference) · No credit card required