Sunday, October 11, 2015

A Review of "The Extruder Video" by Daryl Baird

A while back I was lucky enough to acquire the 2 disc DVD "The Extruder Video" by Daryl Baird and produced by Ceramic Arts Daily.  Took me a little while to be able to watch it as I had to get my computer set up and fixed to watch the DVDs.  Could have used my hubby's PS3... but I can never remember which setting the tv has to be on to use the PS3 to watch DVDs.  Regardless, I was able to watch both DVDs and am sooo very glad I did!  I had paper and pen out ready to take notes.  But I didn't need to!  Daryl walks you through from the VERY BEGINNING in clear, easy to remember steps and speaks like he's speaking to you in a workshop setting and NOT in front of the camera.  Which the dialogue was quite refreshing.  It may be the manner in which he spoke was the reason why I didn't need to take notes!  Every step of the process was easy to remember and I know I can go back and review items if I need to.  So time for the break down of the DVDs. :)

When you get the DVDs, it looks like this (well, covered with plastic..but I took that off.)

 And inside of the 2 disc set.  They weren't numbered, just a list of segments on the DVDs themselves.  So to remind myself, I went ahead and took my permanent marker and labeled them 1 and 2.
One thing I REALLY appreciated, is that Daryl takes you step by step on how to install your extruder fresh out of the box!  Finding the stud, how to install it so that the attachment is sound and won't fall off your wall, setting up your work/staging area, and even some tips on proper body mechanics.  For the complete clay extruding newbie this information is invaluable!!  He also talks about the proper clay condition and how firm/soft you should be working.  Wish I would have watched this before I got and used my extruder 2 years ago!  I have one from TA Metalworks out of Canada, so it's set up a tad different than the NorthStar extruder used by Daryl in the video.  But I've definitely created more ware and tear on my personal extruder as a result of using clay that was too firm to be put through the extruder.
Daryl goes on to explain the anatomy and general construction of hollow dies, how to appropriately handle the hollow extrusion to prevent warping, and then he walks you through some different projects.  Yet again, Daryl proves why the clay community as a whole is awesome!  He shows you several different projects to do and encourages you to make them for yourself, and add your own spin on them.  One such project is his iconic mountain top boxes.

Disc 2 - Tips and tricks on how to make your own custom dies with a variety of materials.  Plywood, metal, plastic, and yes...even credit cards!  The credit card dies were my favorite section as that's something anyone can do without any special tools.  Granted, you can't make a hollow extrusion die out of the credit cards because they don't have enough strength to handle all the stress placed on it during the extruding process.  But that's okay.  I haven't created one yet..but that is definitely on the to-do list!

All in all...I would HIGHLY recommend this set of DVDs to anyone.  From the very beginner who is thinking of acquiring an extruder to the seasoned extruder professional.  Daryl imparts great tips and tricks from beginning to end.  I truly felt like I was participating in a 1:1 workshop with him rather than watching DVDs on my computer.  And NO, I was not paid nor was I asked to write this review.  Just wanted to impart my opinions and personal experiences with this product to the interwebs.

For the clay enthusiast who works with extruding and slab building, there's even a Facebook group for us all to be groupies of!  You can find it here:

'Til Next Time! 

Tuesday, October 6, 2015

Use of Ferric Chloride - Safety Precautions

Good day one and all!  As I've mentioned in previous blog posts, I am a member of the Facebook group, Clay Buddies.  One of the things that I really love and appreciate about this group is the imparting of knowledge from those who have been around the block a time or two, and helping to educate us newbies.  Recently, Dave H., made such a post.  I think it is important to make sure people have access to this knowledge and asked if I could share on my blog for all the interwebs to find.  Here was his post (re-posted with permission).
Photo by Mark McMillan, from the Ceramic Arts Daily Member Gallery
"Concerns about ferric chloride come up enough times that I'm going to jump into this discussion as a former environmental chemist, with a number of years in the health and safety field.
Ferric chloride is used primarily in two different ways in raku. A solution of ferric chloride is sprayed on a hot pot to color the pot, as in ferric chloride fuming of horsehair raku pots. It (a solution) is also painted on bisque pots in the aluminum foil saggar process.
In terms of the toxicity I am going to focus on inhalation hazards, because it is doubtful that you will ingest it. And dermal toxicity is not as much a concern as inhalation toxicity (that is why you wear protective clothing and gloves).
Ferric chloride solutions are acidic. So when you directly inhale a sprayed solution of ferric chloride, the acid irritates and burns your tissues. This is why you start coughing and feel a burning sensation and your eyes sting.
When ferric chloride is heated above 500 degrees Fahrenheit, it decomposes to form hydrochloric acid and/or chlorine gas. If you are doing horsehair or a similar process, the pot is over 500 degrees F, so the fumes you inhale contain toxic hydrogen chloride (acidic) and toxic chlorine gas. In aluminum foil saggar, the temperatures in the kiln are well over 500 degrees F (1000 to 1300), so toxic fumes of hydrogen chloride and chlorine well be given off. This is why they don't recommend doing aluminum foil saggar in electric kilns, the elements and metal parts of the kiln get corroded.
So, HOW TO BE SAFE HANDLING FERRIC CHLORIDE? Don't get it on your skin - wear appropriate clothing and gloves. Wear an APPROPRIATE respirator. A paint mask will NOT protect you from fumes of hydrogen chloride and chlorine. You need a respirator with a cartridge good for particulates and acid gases (chlorine and hydrogen chloride). A particulate cartridge alone will not protect you. You can buy combo cartridges that are good for particulates, organic vapors, and acid gases. Make sure there are no spectators nearby or downwind when you spray.
Having said that, I know MANY potters who do not use respirators when working with ferric chloride. If you watch them you will notice that they always stand upwind when spraying, or use a spray booth. Brushing the ferric chloride solution on pots is not an inhalation problem, there are no fumes/mists/small droplets.
Do I follow my own advice? Most times, but I have to admit that sometimes I make a last minute decision to spray a pot with ferric chloride and don't run get my respirator with the appropriate cartridge. I try to be upwind when I spray and make sure that nobody else is around me. I'll still manage to inhale some and cough a little."
 There were several comments, and some that stood out were by other potters who I highly respect for not only their knowledge but their willingness to share it!  William S. had this to say in response:
" I taught rake processes for years and one thing I always stressed about using ferric chloride was the need for common sense use. During any spraying process, most students did not have the proper respirator cartridges so I had a turntable set up away from the firing area, a small flag to indicate wind direction and a commercial grade portable fan blowing from behind and slightly to one side of the person spraying. FYI - if one uses a metal turntable, place a broken kiln shelf on top to protect the metal from the acidic action of the ferric chloride."

THANK YOU GENTLEMEN for you willingness to help educate those of us less knowledgeable!

As with anything, especially in ceramics, while the hazards may be scary or turn us away from possibly trying certain techniques; so long as proper safety protocols are followed and appropriate PPE (Personal Protective Equipment) is used, this technique can be executed safely.  Remember to follow all safety guidelines and procedures, whether you agree with them or not.  They are there for our safety.  Another clay buddy, Harriet H., said it best:
"As we age, the damage to our bodies accumulates over time and takes a toll on our health. There are environmental factors such as pollution that we don't take into account and the effects are not felt until years down the road even if we only take occasional risks. If you don't take precautions for yourself, think of your loved ones and do it for them."
 I've included links to all applicable MSDS forms. Just click on the highlighted words to go view them.  Or you can follow the links below:


For more information on the techniques that use these chemicals, follow the links below.
Horse Hair Raku (Loveless Pottery has a GREAT post about the technique and if it's right for you)
Saggar Firing (Ceramic Arts Daily posted a very informative article on this, featuring the methods of Charlie and Linda Riggs)