[Cameramakers] Bellows: glue
Michael wrote: The answers to these two questions should be decided together -- you want to select a glue that will work with the cloth and stiffener material that you are using. My guess is that if you use estar-based graphic film, which is essentially polyester plastic with gelatin coating, that you will have difficulty finding a suitable glue. The glue needs to stick but also maintain some flexibility over the lifetime of the bellows. I think that white glue is usually used for bellows, which makes sense because it retains some flexibility. But white glue will probably stick poorly to the film. Unless you see a compelling advantage to using the film for the stiffeners, it might be wiser to stick to the traditional and time-proven materials. If you think that there might be some significant advantage to a new material, it would be a good idea to make a sample layer of the materials and flex it every day for several months as a test. John Cremati replied: I have used white glue to try to rebind some of my books and it does work very well on cloth and paper... but I am dead set on using the Cordura nylon as the outer layer on the bellows. I would have my doubts that the white glue would adhere permanently to these materials... I would have more faith in contact cement ... .. It would be nice if I could find something that would allow a little time to position the two assembles, and adheres to these materials, and is sprayable I imagine in the old days they would have used animal hide glue or fish glue and called it a day. That was about their only option...I will take your suggestion though and give what ever glue I find a test . Regards, John Cremati ... ___ Cameramakers mailing list [EMAIL PROTECTED] http://rmp.opusis.com/mailman/listinfo/cameramakers
Re: [Cameramakers] Bellows: glue
John, I bought contact cement in a quart can from Home depot. I found there was a layer of seperated liquid on the top that is perfect when I need to apply really thin coats. Gene - Original Message - From: John Cremati [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Saturday, October 26, 2002 2:18 AM Subject: [Cameramakers] Bellows: glue Michael wrote: The answers to these two questions should be decided together -- you want to select a glue that will work with the cloth and stiffener material that you are using. My guess is that if you use estar-based graphic film, which is essentially polyester plastic with gelatin coating, that you will have difficulty finding a suitable glue. The glue needs to stick but also maintain some flexibility over the lifetime of the bellows. I think that white glue is usually used for bellows, which makes sense because it retains some flexibility. But white glue will probably stick poorly to the film. Unless you see a compelling advantage to using the film for the stiffeners, it might be wiser to stick to the traditional and time-proven materials. If you think that there might be some significant advantage to a new material, it would be a good idea to make a sample layer of the materials and flex it every day for several months as a test. John Cremati replied: I have used white glue to try to rebind some of my books and it does work very well on cloth and paper... but I am dead set on using the Cordura nylon as the outer layer on the bellows. I would have my doubts that the white glue would adhere permanently to these materials... I would have more faith in contact cement ... .. It would be nice if I could find something that would allow a little time to position the two assembles, and adheres to these materials, and is sprayable I imagine in the old days they would have used animal hide glue or fish glue and called it a day. That was about their only option...I will take your suggestion though and give what ever glue I find a test . Regards, John Cremati ... ___ Cameramakers mailing list [EMAIL PROTECTED] http://rmp.opusis.com/mailman/listinfo/cameramakers ___ Cameramakers mailing list [EMAIL PROTECTED] http://rmp.opusis.com/mailman/listinfo/cameramakers
[Cameramakers] Bellows: glue
Reply by John Cremati I think that they make a special thinner for contact cement that does not affect the tack qualities.Probably Two very thin coats by spraying would be ideal.. The Cordura I have coming has supposedly a light kiss coat of urethane on one side.. which may help in the coating process by not allowing the adhesive to soak deeply into the fabric. I am worried that the 330D may be too thick, even though is has a low denier number compared to the 500D or the 1000D denier which is like a canvas I had recently found out that a even lower number of 160D is used to make light weight swim wear which will collapse into one of its own pockets..., so I may have messed up and maybe should have gotten the 160D. .. I will test it to see how it absorbs the adhesive and how well it may work on a large bellows where a little stiffness may be desirable...I will post the specifics of where I got it and its qualities once it arrives next week... Regards, John Cremati. - Original Message - From: Gene Johnson [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Saturday, October 26, 2002 12:01 PM Subject: Re: [Cameramakers] Bellows: glue John, I bought contact cement in a quart can from Home depot. I found there was a layer of separated liquid on the top that is perfect when I need to apply really thin coats. ___ Cameramakers mailing list [EMAIL PROTECTED] http://rmp.opusis.com/mailman/listinfo/cameramakers
