Fecha de publicación: 13/07/1976 Fuente: WIPO "pollen" Plastic shrink tubes, when filled loosely with explosive powders, and sealed and heated to temperatures of about 300.degree. - 600.degree.F, will shrink and uniformly compress the powders contained therewithin along the length thereof to produce a powder of constant linear density useful in providing constant velocity detonations. -GOVT PAR The invention described herein may be manufactured, used and licensed by or for the Government for governmental purposes without the payment to me of any royalty thereon.