So Laguna 10VW Cone 06 clay is the sort of Cone 06 clay which is perfectly safe to use in a Cone 6 studio. A brilliant choice on your part.
Cone 06 glazes will work on this clay just as well as they work on Cone 6 clays. You may try applying Cone 5/6 glazes to your clay and firing to Cone 5 or 6. You may encounter minor problems, but it won't endanger your kiln.
I think wonderful things can be done combining high fire and low fire glazes. Our studio has a book of beautiful pieces which have combinations of glazes from various cones - some of the pieces with the most incredible depth of glaze were fired as many as 16 times.
Our studio purchased a Cone 2 porcelain which Laguna offered briefly. It had a firing range up to Cone 4. The downside of firing this clay outside of its range to Cone 6 proved to be bloat. What this means is the clay was partially decomposing into gas, and this gas became trapped inside the clay body so it puffed-up like a puff-pastry. This sort of problem poses no danger to our kiln, even it annoyed the artist who make the piece and wanted to fire at Cone 6. That's the sort of problem you may encounter with firing your Cone 05 clay to Cone 6, or it may simply slump a little.
The Laguna Cone 06 earthenware my partner used on the partially slumped fruit bowl had a firing range up to Cone 5 - at which point it retains it shape. But glazed with a Cone 10 glaze and fired to Cone 10 in a gas kiln this Cone 05 earthenware slumped and deformed a little in what I find to be artistic and pleasant manner.
Below is a photo of an even more wild experiment.
I made a structure out of Laguna WC-953 Cone 10 paper-clay http://www.lagunacla...stern/wc953.php,
I then covered this ware with several thick layers of slip made from Laguna WC-437 Cone 6 Frost Porcelain
Looking at the specs, the shrinkage of the porcelain clay is 11% at Cone 5 while the shrinkage of the paper clay is only 8%, so I was hoping the porcelain slip would adhere fully to the paper clay, but crack in an artistic manner - and this is what happened initially in the bisque and more at Cone 6, just not as many cracks as I hoped.
I applied several Cone 6 glazes and also a thin layer of the yellow Cone 06 glaze to this Cone 6 clay and fired to Cone 6. I then applied additional layers of Cone 06 glazes and fired again at Cone 06. The glaze covered the sharper edges of the porcelain clay shrinkage cracks which developed in the Cone 6 firing, as compared with the not sharp fractures which occurred at bisque.
What does Laguna Clay say is the top firing range on 10VW ^05 clay?
Laguna 10VW Cone 06 clay says its firing range is 06 to 3. But even so, they give the shrinkage rate at cone 4 (11.2%).
These are some other pieces made of a Cone 6 clay decorated with Cone 6 and Cone 06 glazes.
This piece also includes Cone 6 glazes fired to Cone 06 - such as the white band around the neck.
You're going to enjoy combining Cone 6 glaze firings with Cone 06 glaze firings.