dfinn Posted March 11, 2005 Share Posted March 11, 2005 Hi, We have being having trouble with gels melting in our fresnels. The melt right in the centre and shrivel up. These gels are nearly 2 years old now so could it be the age? But could it be the lense direcitng the light into a durect beam in the cnetre of the gel and burning it? Thanks Daniel Link to comment Share on other sites More sharing options...
the kid Posted March 11, 2005 Share Posted March 11, 2005 This topic might be some help what colour is it that is burning? and spelling - I can't decipher the second part. Link to comment Share on other sites More sharing options...
SceneMaster Posted March 11, 2005 Share Posted March 11, 2005 Could be a whole host of things… - the gels being low temp for the lights you are using and not heavy enough temp grade for the lights (probably unlikely as the gels I presume have been ok for two year) - The age of the gel (as you say) if they have been used heavily for two years then yes they may be worn and probably lost colour…- The saturation of colour also effects this… for instance I put a yellow filter in a 1k sil30 with diffuser no problems… put red filter in which is exactly the same grade with diffuser and I get a nice little hole in the centre… not really a problem as it didn’t really effect the light major for my event… but it could in different events… There are probably more reasons… I would suggest replacing some of your older gel stock though if it is starting to lack performance and the colours are going… I wouldn’t have thought I would be the fact you have the fresnel spot focused too intensely on it… Link to comment Share on other sites More sharing options...
dfinn Posted March 11, 2005 Author Share Posted March 11, 2005 couldnt tell you which colouurs ie in gel numbers as I havent got a clue but they are greens and reds mainly that are melting. Daniel Link to comment Share on other sites More sharing options...
tony Posted March 11, 2005 Share Posted March 11, 2005 is the lantern focused straight down and are you using barn doorsI have found that this drastically reduces the lifespan of any gell especially saturated colours Link to comment Share on other sites More sharing options...
dfinn Posted March 11, 2005 Author Share Posted March 11, 2005 well yeh, this is the first time the lighting tech has done this, the lights are angled straight down and all have barn doors. Daniel Link to comment Share on other sites More sharing options...
the kid Posted March 11, 2005 Share Posted March 11, 2005 Wide or narrow? Link to comment Share on other sites More sharing options...
richard Posted March 11, 2005 Share Posted March 11, 2005 If the gels are two years old - and have been used reguarly - it is not suprising that they have started to go, some fresnels do have issues where all of the heat of the lamp is focussed right where the gel is, there is little you can do about this apart from adjust the focus, or add heat-sheild. Otherwise I would advise replacing your gel, since each bit can't be worth more than 10 - 20 pence it seems that 2 years is pretty good service! Link to comment Share on other sites More sharing options...
SceneMaster Posted March 11, 2005 Share Posted March 11, 2005 This topic might be some help what colour is it that is burning? and spelling - I can't decipher the second part.<{POST_SNAPBACK}> I could...it didn't read badly, until I read it the second time ;)... maybe something to do with me being mildly dyslexic… ;) Link to comment Share on other sites More sharing options...
stormster Posted March 11, 2005 Share Posted March 11, 2005 2 years service from a peice of gel...........magnificent work, I think its done its time and deserves a burial with full honours. 3 or 4 months heavy usage is normally good for us, or 2 shows for blue in uplighters!!!! Link to comment Share on other sites More sharing options...
gareth Posted March 11, 2005 Share Posted March 11, 2005 OK, a few things .... Two years old?!?! A sheet of colour is only £3-odd, for crying out loud - colour is a consumable item, for a very good reason .... Dark colours 'go' quicker than lighter ones, so expect to replace them more often. If you're using your fresnels on full flood (i.e. widest beam, with the lamp right up against the lens), try backing them off just a bit - taking the lamp away from the lens a tad will make an appreciable difference to colour life. If (as it sounds) you're putting a piece of colour into a lantern and leaving it there long-term, use HT filters, and put them into a frame in the colour runners furthest from the lens - the more air you can get circulating between the source and the colour, the better. Link to comment Share on other sites More sharing options...
dfinn Posted March 12, 2005 Author Share Posted March 12, 2005 The lenses are set to narrow as it is a small space we are lighting. Yeh I expected it would be the life of the gel. I get some ordered on monday. Cheers Daniel Link to comment Share on other sites More sharing options...
spantax Posted March 16, 2005 Share Posted March 16, 2005 The lenses are set to narrow as it is a small space we are lighting. Yeh I expected it would be the life of the gel. I get some ordered on monday. Cheers Daniel<{POST_SNAPBACK}> Get some paperclips, and attach the gel to the barndors of your fixture, instead of using the gelframe. That way you get it away from the hotspot of the beam, and it will last longer. SpantaxLampettGeneralen Link to comment Share on other sites More sharing options...
smeggie Posted March 16, 2005 Share Posted March 16, 2005 but be carefull where the trick is used - it can look dead shoddy if done in a hurry. Link to comment Share on other sites More sharing options...
david.elsbury Posted March 16, 2005 Share Posted March 16, 2005 Get some paperclips, and attach the gel to the barndors of your fixture, instead of using the gelframe. That way you get it away from the hotspot of the beam, and it will last longer. SpantaxLampettGeneralen<{POST_SNAPBACK}>Or wooden clothespegs. Used in the film industry a lot. Link to comment Share on other sites More sharing options...
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