Abstract: A water soluble lubricant for condoms includes at least a sliminess agent and a penetrating agent, and optionally, a humectant. The water soluble lubricant has a good penetrating feature to the wound up part of a condom, does not whiten the surface appearance of a condom, and provides sliminess and wettability to a condom to which the lubricant is applied. Water soluble penetrating agents which have good penetrating effect to the wound up part and do not whiten the appearance of a condom include sodium-lactate and trimethylglycine. Humectants which provide a condom with good wettability include glycerin and propyleneglycol. The water soluble sliminess agent which provides a condom with sliminess may be pullulan.

Abstract: This invention relates more particularly to a process for making a balloon to be used with an endoscope in which, according to the present invention, the balloon is processed of a basic material solution including a natural rubber latex or synthetic rubber latex to which is added a sensitizer to radiation cross-linking so as to act and accelerate its cross-linking effect by irradiating ionizing radiations such as gamma (.gamma.) rays utilizing a Co-60 source upon the rubber latex mixed with the sensitizer to radiation cross-linking, which is characterized in that such the balloon can be provided without any vulcanizing process as in the conventional, process.

Abstract: This invention relates to a balloon and its process which is used in endoscope for observing, diagnosing and curing diseased parts within blood vessel or tubes, a transparent thin film body is provided in forming an inflating portion incorporatedly with an end of a fixing portion wherein the fixing portion is fixed with the end of endoscope, and the transparent thin film body will protect those attachments of endoscope such as light-guide, object glass, optical fiber and the like which are installed in said the end portion of endoscope, wherein it is useful for observation, diagnosis, cure and the like by means of the inflating portion being inflated by injection of physiological salt solution into the interior of inflating portion, in addition a medical laser beam is irradiated so as to be able to cure, that is, the laser beam is transmissible through the balloon itself which is also seeable through.