This commercial item description describes two types of dust mop treating compound:
Type I – Regular (ready to use).
Type II – Concentrate (dilute 1 part concentrate with 6 parts water).
Both types I and II, when diluted 1 to 6, shall be stable, free-flowing liquid emulsions consisting of mineral oils, emulsifying agents, and water.
Salient characteristics.
Mop strings when impregnated with the compound, shall retain not less than 22 percent of their own weight of synthetic soil. (see notes).
Type I compound shall be stable, without separation or creaming container.
Type II compound shall form a stable emulsion when mixed 1 part compound to 6 parts water, i.e., the emulsion shall stand without separation or creaming for not less than 1 hour after mixing.
Certification. The contractor shall certify that the product offered meets the salient characteristics of this description and that the product conforms to the producer’s own drawings, specification, standards, and quality assurance practices and is the same product offered sale in the commercial marketplace. The Government reserves the right to require proof such conformance prior to first delivery and thereafter as may be otherwise provided for under the provisions of the contract.
Packaging, packing, and marking. The dust mop treating compound shall be packaged in accordance with normal commercial practice and packed in the fiberboard boxes that will assure acceptance by common carrier and provide product protection against loss and damaged during multiple shipments, handling, and storage. The shipping container shall be in compliance with National Motor Freight Classification and Uniform Freight Classification. Shipping containers shall be marked in the contract or order.
Notes:
Dirt pick-up efficiency:
Impregnation. Weigh 20 to 30 g of dry mop strings to nearest 0.0 g immerse for 10 minutes in Type I and Type II, diluted 6- with water. Remove strings from compound and shake to remove excess liquid. Age for 24 hours at 25o+2oC, and 50+5 percent relati9ve humidity and weigh. Then age for 48 hours at 50 + 2oC and 65+5 percent relative humidity. Allow to come room temperature and weigh. The amount of compound on the mop strings after the 48 hours aging should be 17.5 percent minimum and 35 percent maximum, and the impregnated mop after 48 hours aging shall be within 1 percent of its weight after the 24 hours aging.
Synthetic soil. Prepare a synthetic soil according to the following formulations,
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Ingredients |
Percentages |
Walnut sawdust: made with a rotary sanding machine
NO.2 paper on the open grain flat surface of walnut wood . . . . . . . . . . . . . . . . . 2
Free carbon:
Lampblack. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Charcoal, cocoanut, 6-14 mesh . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Silica:
18-120 mesh . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
140 mesh . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
240 mesh . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Pumice powder, N.F . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Fuller’s Earth, powder, technical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
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