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Mark C.

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About Mark C.

  • Rank
    Advanced Member
  • Birthday 03/15/1953

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  • Website URL
    http://www.liscomhillpottery.com

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  • Gender
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  • Location
    Near Arcata Ca-redwood rain forest
  • Interests
    Diving-underwater photo-salvage diving-dive Travel
    Extreme offshore tuna fishing off north coast of Ca.
  1. Cleaned studio-back to work in clay on the 31st-taxes almost done

  2. Mold making Problem

    You never said what your master is made of-most masters are made from rubber-I feel yours may be plaster??? I use as well as pros Polyurethane parting compound-this may be hard for you to come by-a gallon lasts about a lifetime . Its made to seal plaster and rubber masters. I would do as Min suggests above dry and shellac. Then what has not been suggested is just after pouring your plaster from Corner of mold vibrate the whole table to let the air bubbles rise -a small hand sander works well for this or you can tap or beat on table. Make sure your mold can take this vibration. This is a tip from a pro I learned long ago. I had a mold business-getting for a decade and we did this every year with all working molds-they where all 3 piece.We cast aroma therapy lamps for Frontier Herbs (they are in most Health and organic markets with herbs today)for just over a decade-cone 10 wares in porcelain-made way over 10'000. of them.A small aroma therapy company near me contracted us to supply them with lamps and they got bought up by Frontier after a few years for 5 million$. I have 4 left on a shelf to remind me never to get into slip cast business again.
  3. Ron I have fired a car kiln on average 30 times a year for 4 decades-counting bisques and glaze fires (60 total a year )thats a lot of stacking.One learns the secrets of a stable firm stack. All shelves are with three pot stilts (posts)You stack them so they are not wobbly as you go.This takes some tricks. I use 3 sided stilts (tri-post)-that are 2 inches wide on each side (they stoped making these a few years ago out west here)now they are smaller and less stable . A three sided stilt allows for more pots on a shelve than a square one.Especially round forms. You lift a corner of the shelve so the post get to where they need to be. Repeat as you load. I have lost a glaze load twice-once was a 7.0 earthquake-the other was a melted stilt that failed near the bottom. I also lost part of a bisque while rolling in and there was a rock on track-most of green load went over(that was in the 90's) All this makes you get that pots are not precious and you just make another load. After lots of stacking you no longer need a tape measure to measure pots as you get an eye for height of everything. I still use a tape to measure the top of load as I need to stop the height at 72 inch's off concrete floor. Once the load is fired it super stable as its a bit fuzed together. You roll it in slowly and make sure the tracks are clean. With a car kiln you can load from 3 sides and its 100% better on your back, same with unloading. If I had done this in an electric since the 70's my back would not be working anymore with the volume I have produced during this time span. I made this one in the 70's and rebuilt it a few times since.Its got about 12 feet of brick in the stack(chimney ) and then another 15 feet of 10 inch diameter stainless steel with a bird screen on top.Its guy wired for stability on 3 points.I love stainless and also used it in my salt kiln stack as well. I like the look of hard bricks so my outer layer is hard brick the inner layer is a mix of soft bricks -K28s in fire box and K 26s in side walls and down back wall-some k 23s in back wall. The arch is all k28s. At this time I have fiber covering the side walls but it will give up the ghost after about 10 years. One side is starting to fail. The fiber and bricks are coated as well.-This is the current layout-over the decades I have had all k23s (many spalled in firebox) and at one time the whole kiln was fiber coated including the arch.All these techniques I have tried and learned from. Speaking of arches mine is two layers-the inner is k28 the next is k23s and then about 4 inch of fiber. My side Walls are all 9 inches thick in kiln. One last note many of my fellow production potters all use car kilns-I know of many out there.. Back in the day we all learned how to make them.. In the mid 80's Lou Nils published the Minnesota flat top car kiln plans and that started another craze of car kilns. When I rebuilt mine min the 80sI used Lou's tapered car seal design.I love arch kilns and have made many and arch. Hopefully I covered what you asked.
  4. Clean Footrings

    With what you call cold wax -using a small cut damp sponge gives you a very clean edge.
  5. Thank you all for the shout out-Both Callie and I had PM'd each other about this happening in the same issue. If you want to see my car kiln and a double booth at a show its in the article as well as some high fire glaze formulas in the back from me and Callie (hers are cone 6-7) Her piece is on Marketing and mine covers some of that as well. Thanks for the kind words.
  6. What I have found is old plaster sieved is much weaker than new plaster-it never sets off right and is softer its whole life. Its good for a damp box bottom in a plastic tub but more molds it wears out to fast and chips easily for bat making .
  7. Plaster will last a long time in the desert .The best ones are in Chile and Africa. Everywhere else it collects moisture . The more moist your climate is the quicker it will get lumps in it. Lets see any snow or cold moist air in PA this time of year?The best way is to put it as soon as you buy it in a plastic trash sack and seal that up.I tend to use two bags as that seems to last a bit longer if one gets a hole in it. Once you open the bag it really sucks up the moisture in the air. . That will happen even in an unopened bag as well. The plastic bag will slow down this process. Now if you keep that bag in the rafters above your wood stove in the living room all winter then it will have a small chance of keeping dry.I doubt many do this-and if you do keep that fire burning as wood heat drys out the air,If you are like most its in lesser location. Once you open that bag keep that (outer plastic bag sealed ) and as Oldlady said use it soon or toss it. It WILL get lumpy . For me plaster costs about 16$ a bag around here(#1 pottery) and I always just buy a bag when needed-I try to keep it going in summer but winter is just to moist to keep it here. There has been many a post on plaster here if you need some late night material to read.
  8. I use mold lube soap from Laguna (pure lube)as a release-you want to keep all oils off plaster so the pores do not seal http://www.axner.com/pure-lube.aspx
  9. This is the week of shipping one mug at a time-its brutal

    1. yappystudent

      yappystudent

      Hang in there Mark. 

    2. What?

      What?

      I didn't read anything in the Feb 2018 issue of Ceramics Monthly about the brutality Mark C has to face shipping out one mug at a time. Nice write up.  I think a while back you mentioned you were contributing to an editorial. Always nice to see and read articles from people I have meet here and in person.

  10. I was a raised in a creative family-mostly of teachers. Mother taught until retiring High School and Junior Collage Father sold insurance as an independent agent Both not on planet now. Art was something well all did from early age-same with building things , diving,surfing in the 50's-all water sports as well as track and field (had our own pole vault and high jump pit in backyard)and traveling as a family. I had been to Mexico 10 times at age 10. I was the youngest of 4 siblings-3 brothers and a sister-age spread was 11 years from oldest brother to me. My brothers exceeded at art-I could not draw well. In high school I was exposed to clay and the rest is history -bought a power wheel in HS as well.Never looked back.Never thought about the future with clay either. My oldest brother got a scholar ship to Stanford as a track star and was headed to Tokyo Olympics in 65 and later taught art at California UCSB in Santa Barbara in 1966- 1992-they built him a print lab building back then when the schools had money till presnt.Died of melanoma in 1992 My sister taught elementary-all grades for 35 years-is retired in Summerland-next to Montecito,Ca-still surfs every week at 73 Middle brother did art, Track and collage and committed suicide at age 23-had some serious health issues I did art ,track until High School, clay and have had melanoma removed 5 years ago. I'm on get looked at every 6 month program for life for skin cancer. Pottery full time since 76-till present-still diving and traveling
  11. Dragons think pop up shows are good!

    No pop up shows in our non urban ,non big city, non mid city sized area. Really only two or three outside summer shows and one winter inside show in the whole area. Our local farmers market which has 40 years of history does not let potters or non food items in it. There are few small art summer venues but they are small and not well attended. I think if you brought a Dragon it may help .
  12. Well the thread on show types got me thinking the various shows out there. I have done several types over my 40+ career Please add your own show types to the list Juried Fine art shows Juried shows-less than fine art Farmers markets Pop up shows (US) and Canada Local events put on my various folks like clubs and organizations County fairs-rodeos City events Trunk shows Private sale -like a studio sale or like my own xmas sale in a shopping center Studio Sales-varoius types-art tours-open studios
  13. Pyrometer Usage?

    You will be pleased knowing the digital temps as you fire-like going out of the buggy age to a car. Soon you will have several of them and wonder how you lived without one.
  14. Shipping season really?

    Packed up 8 place setting dinnerware set-3 piece and some extra stuff. Box was 45#s-pdouble boxed-shipping to southern California via UPS on Monday.(not a UPS holiday it turns out. I made this set at end of last year and just got around to getting back to customers after the busy holiday.This will be nice January check.
  15. Shipping season really?

    I try to keep quantity of sheet Styrofoam in stock I snap up whatever I can find-I also find it at the dump/recycle/transfer place-they keep a bin of just that.I like it in different thicknesses. I also try to keep that sheet soft foam Mea has in photo. I NEVER buy any packing materials -there is so much that gets tossed it easy to divert it. I have a few business's that I stop by -they save it for folks like me.I have a Costco shed for packing stuff and coolers for fishing to store it in.
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