May 1, 1921 



THE INDIA RUBBER WORLD 



561 



A Glossary of Words and Terms Used in the Rubber Industry — V 



By Henry C. Pearson 



PLANTATION RUBBER— Continued 



GOOD Dakk Brown Crei'e. Thick ur thin. A New York term 

 for low grade crepe. See Crepe. 

 Grading. The selecting or classifying of rubber with re- 

 gard to market values. 



Good Smoked Sheet. A general term for fair grade smoke- 

 cured rubber. See Sheet. 



Ipoh. .^ Singapore sub-grade of unsmoked sheet rubber com- 

 paring woU with types A and B blanket crepe with regard to 

 strength but shrinking about 8 per cent on an average. Takes its 

 name from the district in which it is produced. See Sheet. 



Klang. a Singapore suib-grade of unsmoked sheet named after 

 the Malayan district in which it is produced. A strong rubber of 

 the A and B blanket crepe types, with a shrinkage ranging from 

 5 per cent to 8 per cent. See Sheet. 



Kuala Kangsar. Rubber named after the Malayan district of 

 that name. See Sheet. 



Kuala Lumpur. Rubber named after the Malayan district of 

 that name. See Sheet. 

 Lace. A very thin open sheet. Has been superseded by crepe. 

 Light Amber Crepe. See Crepe. 



Lump. — A Batavian term for rubber which has been coagulated 

 in the cups, or has become coagulated on the way to the factory, 

 or rubber which had coagulated ahead of time at the factory. See 

 Crepe. 



Malacca. A Singapore sub-grade of unsmoked sheet named 

 after the Malayan district of that name. In two qualities, dry 

 and wet, the latter seldom coming to market. The dry runs 

 from a good pale color to brown and will crepe to form types 

 A and B blanket crepe of about the same color as the original 

 sheet. The wet sheets or mixed Malacca sheet are dark and 

 make a good, firm type of C blanket crepe, with 3 to S per cent 

 shrinkage. See Crepe. 



Massed or Rolled Crepe.. New York term for earth crepe 

 See Crepe 



Medium Color Brown Crepe. Tliick or thin. A New York 

 term for a medium grade of crepe. See Crepe. 

 Mexican Plantation. See Castilloa. 

 Mixed Malacca. See Malacca. 



Mottled Crepe. A New York term for No. 4 amber. See 

 Crepe. 



Mouldy Rubber. Rubber that is surface stained or spotted 

 with fungus growths. 



Muar. a Singapore sub-grade of unsmoked sheet named 

 after the district producing it, medium brown in color, but grow- 

 ing darker after crepeing and drying, strong ibut inclined to 

 soften. Shrinkage 8 per cent. See Sheet. 



Machine-Smoked Sheets. Thin layers of rubber latex that 

 have been smoked in a machine, coagulation being effected after 

 the manner of the Brazilian "smoke cure." 

 Manihot Crepe, Sheet and Scrap. See Ceara. 

 Normal Latex. Undiluted latex with a dry rubber content of 

 30 per cent. 



Nearly-Clean Dark Brown Crepe. A grade of bark rub- 

 ber. See Crepe. 



Off-Color Crepe. A Batavia grade of crepe made from latex 

 that is diluted with rain water. See Crepe. 



Off-Color Latex. New York term for a grade of crepe. 

 See Crepe 



Off-Quality Ribbed Smoked Sheets. A Singapore and 

 Batavia term for a grade of smoked sheet. See Sheet. 



Off- Standard Latex Crepe. A New York term for off-color 

 latex. See Crepe. 



Over-Smoked. A tarry condition of robber due to oily fuel. 



Papua. Plantation Hevea from the island of that name. 



Penang Sheet. \ Singapore sub-grade of unsmoked sheet 

 named after the producing district, dark and strong. When 

 creped, makes a good type of C blanket crepe. See Sheet. 



Philippine Plantation. See Plantation Para. 



Plain Smoked Sheets. A Singapore term for a grade of 

 smoked sheet. See Sheet. 



Plantation P.\r.\. A general term applied to rubber grown 

 in the Far East from the cultivated llcvca brasiliciisis, the product 

 being usually named after the districts supplying it as : "Ceylon," 

 "Malay," "Straits," "Java," "Sumatra." This rubber also comes 

 in a less degree from Africa, Dutch and British Guiana, Trinidad 

 and the Philippine Islands, and the grades bear the names of the 

 country of origin. 



Plant.^tion Smoked Sheets. Rubber which, after coagulation 

 with acetic acid, has been cured and dried in the smoke-house. 



Plantation Rubber. A general term for all cultivated rubber, 

 cliiefly that derived from the Hevea, but also including planted 

 Castilloa, Manihot, Ficus, Funtumia, etc. 



Prime, Clean, Light Brown Crepe. A New Y'ork term for a 

 medium grade of crepe. See Crepe. 



Prime Pale Crepe. A Java term for the highest grade of 

 crepe. See Crepe. 



Prime Ribbed Smoked Sheet. A Batavia term for a high 

 grade smoked sheet. See Sheet. 



Ribbed Sheet. A Singapore term for a high grade sheet. See 

 Sheet. 



Rolled Bark Crepe. A Singapore term for a low grade crepe. 

 See Crepe. 



Rolled Crepe. A New Y"ork term for low grade crepe. 

 See Crepe. 



Rambong Crepe. Ficus rubber machined like plantation Para. 



Smoked Sheet No. 1. East Java term of prime ribbed sheet. 

 See Sheet. 



Smoked Sheet No. 2. A New York term for plain smoked 

 sheet. See Sheet. 



Smoked Sheet. See Sheet. 



Sheet. A grade of plantation rubber nearly equal to the best 

 grades of crepe, the chief difference being its physical shape. 

 Most of it is smoked, although some comes to the market as the 

 unsmoked. \ further diflference is made between that which 

 is ribbed or has diamond shaped markings from the washing- 

 rolls and that which is smooth. The first New York grade is 

 known as ribbed smoked sheet ; in Singapore as standard 

 quality ribbed smoked; in Batavia, prime ribbed or diamond 

 smoked; and in East Java as No. 1 smoked. The second grade is 

 known in Singapore and Batavia as off-quality ribbed smoked ; 

 and East Java as No. 2 and No. 3 smoked. This grade is fol- 

 lowed in New Y'ork by standard quality smooth smoked ; in 

 Singapore as smooth smoked. The unsmoked is known in New 

 York as standard quality unsmoked sheet ; in Singapore as clean 

 dry pale amber and light brown unsmoked sheet. Tliese ari 

 grades in which there is much variation, as they are often from 

 small native plantations and usually bear the names of the local- 

 ities from which they come. .Such as Bjambi, Ratu, Pahat, 

 Ipoh. Klang, Kuala Kangsar, Kuala Lumpur, Muar, Pcnang, etc. 



Smoking. The process of drying, curing, disinfecting and pre- 

 serving freshly rolled coagulated latex in the fumes of burning 

 wood, coconut shells, etc. The characteristic ham-like odor of 

 rubber thus treated is due to the absorption of a small amount 

 of creosote. 



'Continued from The Inhia Rvbi!er World. April 1, 1921, pages 481-482. 



