If they are streaks or whisps of cloudy, make sure you are mixing and then over mixing the materials as this could be a swirl of A side which would phase and turn white/cloudy.
One example of how we've noticed this is when we've used cups with grooves on the side rather than straight walls. So make sure you are mixing in a straight wall cup ... not a Solo type cup with ridges/grooves on the side. Reason being ... your stir stick will not be able to scrape/mix the material in those groves and then when poured you have either A side or B side that is unmixed that pours out of those grooves and into your mold which will leave streaks that can turn white or cloudy which might be described as whisps.
I ordered the clear less than 2 weeks ago and used right minutes after it was delivered. I went ahead and heated, shaken the clear and made a pour. I've been busy with work so I won't be able to pull the molds till later in the afternoon tomorrow. I will post my results than and go from there.
Ok, so I just pulled the piece from the mold and it came out amazing. Now I see the ones I did earlier which I thought were a success fail in comparison to the clarity of this one piece. So heating the resin to 130F and shaking them seemed to do the trick. Too bad I had to burn through most of my 2lb kit to get it working propperly. :/
I have used the water clear for many applications and use two measuring cups. Degassing before mixing and after mixing. If the mix is 20g of A and B I use A as the mixing cup and because all of the product never leaves the measuring cup I add about .40g of B before pouring the two together. Mixing for 30 seconds and then degassing again before pouring. Then leaving it the part under pressure 60 psi for about 3 hours, demold and place in 165F heat for one hour. No clouds.
Post by carol - Alumilite Corp on May 23, 2017 9:53:19 GMT -5
Good Morning Bill,
It is best to use a separate cup for mixing ... use a smooth side "dixie" type cup works very well. When you have a smooth sided cup then make sure to scrap the sides, pulling resin from the bottom of the cup into the mix blending well so there is a complete chemical cross linking of the resin. That way typically you can be confident you will have a nice inert and cured clear piece. If you are too heavy on the A side (measurement by weight not volume), or it is not mixed/blended well (it is not so much how long you mix, but how you mix/blend) your results will vary from white striations, tackiness, incomplete cure, and up to a solid white resin coloring.
If there is anything else, please let us know, via forum, email, or please call if you like.
Hi Carol; I used to use the three cup method. But pouring two cups into one became time-costly when I tried to scrape the insides of both cups. Then mixing for 30 seconds didn't give time for degassing before pouring. Maybe I'm not quick enough. And I use a "Solo tumbler 10 oz. clear cup which allows good visibility when scraping the sides. Also most of my pours are 35 to 45 grams of each A and B, the 10 oz cup has room for degassing part B with out flowing over the edge of the cup (when using the Flex systems). Solo also has the 18 oz clear cup for larger pours. But I might try the "Dixie cups". Thanks Bill
Post by carol - Alumilite Corp on Jun 5, 2017 14:28:20 GMT -5
Try the dixie cups and let me know, please. The ridges on the inside of solo cups can create issues trying to get a good blend Bill. Have you tried not vacuuming (just using pressure if you have one?) I would say the vast majority of people using either of the urethane clears, use pressure. It generally isn't so much how (of course it needs a few minutes) long you mix/blend it is how you do it.
David....Not making excuses, but......... As far as the big box stores go, I really have my doubts that the Alumilite products are rotated....in this case the clear (oldest to the front, new stock to the rear) ...also shipping schedules from the big box stores warehouse to the stores them selves in regards to shopping seasons, sales specials etc. etc. could result in either a quick turn around or a no rush regular shipment schedule as far as the Alumilite products being received at the big box warehouse from Alumilites warehouse to be shipped to the retail stores....I highly doubt that the Alumilite products stay warehoused at Alumilites facility very long just for the shelf life reason alone. So the chances of someone stocking the shelves at the big box store actually checking the clear's "born on date" is slim to none. Depending on shipping schedules, product could easily spend a 1/3 of its 3 month shelf life before opening being at the big box stores warehouse before a purchasing agent orders it for a particular store.
One of the biggest issues with the clear is repeated opening and closing of the container, thus introducing moisture, even in a relatively low humidity environment i.e your home. Another issue that comes up is mix ratios being off due to improperly measuring side "A" and "B"