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Description
SP865 Mars850 891 Raku glazes were developed for firing in either electric or gas kilns. The firing process is described below. Eleven of the Raku glazes are lead free and non toxic (850,851,854,856,871,872,873,874,875,877,878). All of the rest are lead free, but are over the threshold limit for copper and are therefore toxic in the liquid state. Liquid glazes (available in 4 ounce, pints and gallons) are set up for brushing application. They can also be poured
850-891 - Raku glazes were developed for firing in either electric or gas kilns. The firing process is described below. Eleven of the Raku glazes are lead-free and non-toxic (850,851,854,856,871,872,873,874,875,877,878). All of the rest are lead-free, but are over the threshold limit for copper and are therefore toxic in the liquid state. Liquid glazes (available in 4 ounce, pints and gallons) are set up for brushing application. They can also be poured or dipped on pieces, although they should probably be thinned with a little water for this type of application.Due to the many variables involved in Raku firing, particularly during the reduction phase, our chip charts and printed color charts should be used only as approximate guidelines. Your results may vary greatly due to different firing conditions.
RAKU FIRING – Raku glazes can be fired anywhere from 1600 F up to cone 06 (1850 F) in either an electric or gas kiln. We recommend firing 850 to 856 and 868 to 879 to a peak of 1700 - 1750 F and 860 to 866 to a peak of 1600 - 1650 F. They should be allowed to cool in the kiln to 1600 F. Different combinations of peak temp and reduction starting temp will produce different results. While still red hot they should be transferred as quickly as possible into a reduction bin (typically a lidded metal garbage can or small metal container that has been lined with organic material, such as newspaper and/or sawdust, etc.). As soon as the pieces are in the bin the lid should be put on to keep oxygen from entering the container, in order to develop the reduction atmosphere. The pieces should be allowed to cool in the bin for at least 20 minutes.
WARNING: When red hot pieces go into the bin, the organic material ignites and will produce flames and smoke. This part of the firing, particularly the opening of the reduction bin, should be done outside. Always take safety precautions when firing raku such as the use of high temperature gloves, protective eyewear, and a respirator. Always have a fire extinguisher handy.
Shipping Notes
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
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4.3 ★★★★★
Based on 999 reviews
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Product Reviews
★★★★★ 5
As Advertised.
Color: Boysenberry, Size: 1 inch
The boysenberry color is pretty. The Retrospec mat is odor-free, 7/8” thick (so close enough), dense, and non-slip on my wood floor. I wanted the density to cushion pressure points whilst performing various core exercises and general stretching on the floor. It works well for my purpose. I agree with other commenters, the 1” thick mat is too unstable for yoga. That said, the slight instability makes this mat useful for developing balance and core stability by balancing on uneven surfaces, similar to the benefits of walking on grass or trails. The mat is easily nicked by long nails (human and animal) rocks, sticks etc. so pay attention to where you set it up; however not a deal-breaker for my use. I originally looked at the BalanceFrom GoCloud mat because it is the mat that appears in several online reviews with a link to Amazon. However, once on Amazon, I noticed remarkable similarities between the GoCloud and Retrospec reviews. I suspect both mats are identical just with a different brand name and sold by different companies. I ultimately went with the Retrospec mat because the Retrospec is sold and shipped by Amazon so the benefits and protections of “Amazon Prime”, including free returns, apply. The GoCloud mat could be returned however according to the fine print, if the return wasn’t due to Seller’s error the return might be subject to a restocking fee. One of the most objectionable review comments common to both brands had to do with the mat having a terrible, lingering odor. I was willing to take a chance and order it, but would have returned it if it had a bad odor. I did not want to pay a restocking fee so went with the Retrospec mat sold and shipped by Amazon. One exception is Amazon Prime offers the GoCloud in black only. I didn’t want black because I expect to occasionally use it outside in the Florida sun and it will get really hot.
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Reviewed in the United States on May 26, 2024
★★★★★ 5
Ideal weights
Style: 32lb Set, Style: 32lb Set
These hand weights are proving to be incredibly beneficial for our recent return to fitness routines. Their compact size makes them exceptionally well-suited for our limited living space. We have found them to be the ideal solution for incorporating strength training into our daily lives. The ease with which they can be stored further enhances their practicality. We highly recommend these weights for anyone seeking an effective and space-saving workout option.
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Reviewed in the United States on November 4, 2025
★★★★★ 5
Quality weights for all fitness levels
Style: 32lb Set, Style: 32lb Set
Why did you pick this product vs others?:
Good quality and the stand is very sturdy.
The stand was super easy to put together and it’s held up incredibly well. I’ve used these weights almost every day for the last couple months and they aren’t showing any signs of wear. They are definitely well made were exactly what I was expecting. The stand has been knocked over and dropped many times and it still works and looks as good as the day I put it together.
They are very comfortable to hold during workouts and they aren’t slippery when your hands get sweaty.
I would definitely recommend these!
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Reviewed in the United States on July 10, 2025
★★★★★ 5
Nice weight set for Bar Method
Style: 20lb Set
I do a low impact workout called Bar Method. I love these weights because they match the ones we have in class. They function well. No issues over many workouts. They look nice on my little workout shelf, too. I recycled the stand. Didn't need it. Good value for the weights you get.
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Reviewed in the United States on December 17, 2025
★★★★★ 5
Solid Weight Set
Style: 32lb Set, Style: 32lb Set
Pretty solid set of weights. Love that it comes with a little rack. The rack is plastic but for the weights I got (3, 5, 8 lbs) it feels sturdy enough. The texture and quality feel exactly like the weights that the high end Pilates studio I go on occasion uses. Seems durable and easy to keep clean. Would definitely recommend.
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Reviewed in the United States on June 15, 2025
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