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Frequently Asked Questions

How do I choose what clay to order?

Determine what temperature or cone you are able to fire to and consider what kinds of projects you or your students will be doing i.e. wheel throwing and/or hand-building. Then decide if you prefer a red or white clay, something coarse, smooth, or speckled etc.

Our most popular clay is the RO14 Light Stoneware because it can be used with low fire or high fire glazes, and is well suited for any type of project or skill level. This clay fires to a bright white at cone 05 and off white at cone 6.

Another great choice is the RO82M Terra Cotta with Fine Grog This is a red clay that can also be fired at both low and high temperatures. Great for throwing or hand-building, this clay has been a favorite of many artists, teachers, and students.

Other notable options for the classroom are the RO-42 and 42G, RO-72, and RO-82.

Still not sure what clay is best for you? Call or email Rovin, tell us a few basic qualities you are looking for in your clay and our experts will be happy to recommend some options. 


How much clay do I need?

Rovin clay may be ordered in 25lb increments, Laguna in 50lbs. A small hand-built project or cup/mug usually takes about 1-2 lbs.  For teachers, determine how many clay projects the students will do and how many students you have. You will likely need about 1.5lbs per student per project. By this measure, for one project, 1 box of clay will provide for around 16 students.

If you are an artist, hobbyist etc, the same process applies; if you are throwing pots estimate how many pounds of clay you will use per pot and divide 25 or 50 by that number (Rovin box or Laguna box.) That will give you the number of portions per box. Be sure to allow for some scrap/extra clay.

EX: I want to make 12 3lb bowls. 25lbs / 3lb =8.33 =roughly 7 or 8 bowls per bag if I don’t make any mistakes. I will buy 2 boxes or Rovin clay or 1 box of Laguna clay which will leave me about 4 extra 3lb balls in case I make mistakes.


How do I place an order?

Schools/Studios & Institutions

 If your school or institution is ordering from Rovin for the first time, you can give Rovin your school’s contact info, address, and tax exempt info (if applicable, this requires filling out a form from Rovin) and Rovin will arrange your first quote or sales order. Orders can be placed by phone, fax, or email. Our online checkout does not allow for a tax-exempt option.  Rovin accepts purchase orders, or POs as a method of ordering. You will need to fill out a credit application to be set up as a net 30 customer (meaning school may remit payment within 30 days of receiving invoice.) Once your application is complete you may begin ordering as a net 30 customer, however the first order will need to be paid up front in full.


Orders may be placed through our online store, phone, or email. Rovin clay must be ordered in increments of 25lbs and Laguna in increments of 50lbs. When ordering clay or online, you must type in the number of pounds rather than the number of boxes in the ‘quantity’ box, then add to your cart. Example: If you want to order 2 boxes of RO-14, type in 50lbs in the quantity.

If ordering through our website, be sure to select the correct shipping option. Customers may choose “Pick up at retail location” if they would like to pick up their order rather than have it shipped.


How much does shipping cost?

If your order is 200 pounds or more, we will ship it on a pallet. Shipping any quantity between 200 and 2400 pounds (the weight limit of one pallet) will be the same price. On average, pallets shipping within South East Michigan cost between $115 and $120 per pallet. This cost does not cover inside delivery. Shipping cost is subject to change. If you are ordering from further North or West, or out of state, contact Rovin for a shipping quote.

Rovin uses R&L Carriers for all freight shipments. You may schedule your delivery with Rovin when you place your order. In-state, Ohio, and Indiana have a 1-day transit.

Orders less than 200 pounds will be shipped via UPS Ground. Shipping costs for these orders vary significantly, contact Rovin for a quote. Lead time is between 1-5 business days.


How is my shipping cost calculated?

Our website works with UPS to calculate shipping based on weight of the objects ordered. Unfortunately, there is no way to predict the package size required as we carry thousands of products with widely varying dimensions. The website is also unable to predict how many packages it will be split into, and instead assumes one order will be shipped in one package. Most of the time this doesn’t make a significant difference in cost but occasionally the website will overestimate the shipping charge in check out. Main things that affect shipping cost is weight, package dimensions, and shipping location. In addition to this, Rovin’s annual volume of packages shipped through ups determines our baseline rates. This is largely why we are not able to ship for free or as low of rates as big box companies like amazon. Rest assured, if we ship your package and find you were overcharged for shipping, we will refund the difference asap.


What is the difference between cone 5 and cone 05?

There is a common misconception that cone 05 and 5 are the same temperature. Cone 05 is actually much lower in temperature (1886 degrees F) than cone 5 (2167 F) . Think about the ‘0’ as a negative number sign. from lowest temperature to highest temperature the cones would be 05, 04, 03, 02, 01, 1, 2, 3, 4, 5. See Cone Chart here for details on temperature. 


What is Bisque, Low-fire, Mid-fire, and High-fire?

A “bisque” firing is the first firing of greenware to a low temperature (typically between cone 06 and 04, 1830 to 1945 degrees Fahrenheit) to harden the clay just enough to apply glaze. This is done when clay pieces are bone dry.

Low-fire” is a glaze firing temperature ranging between cone 06 and cone 04 (yes this is the same temperature as most bisque firings) Typically between 1830- and 1945-degrees Fahrenheit. This is commonly used for earthenware or terra-cotta clays.

Mid-fire” is a glaze firing temperature between cone 5 and cone 6, between 2185 -2232 degrees Fahrenheit (though it can include cone 4 through cone 7.) This is the most popular glaze firing temperature for electric kilns. Clays typically fired at this temp include midrange porcelains and stonewares.

High Fire” is the highest glaze firing temp typically seen used in gas and atmospheric kilns though there are many electric kilns that are capable of this temperature range. High fire encompasses cone 8 through cone 12 though cone 9 and 10 are the most common “high-fire” cones from.