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  #141  
Old 03-24-2010, 07:35 PM
Il Pizzaiolo
 
Join Date: Jun 2009
Location: So. Orange County, CA. USA
Posts: 1,155
Default Re: Oven Curing

ML, You need to build your heat up slowly.. Here is what I started with.. I placed a quartz work lamp inside the oven and kept it on for several days. If I remember right this will take your temps up somewhere around 130 and since your leaving it there for days on end you'll heat more mass then you will with a small fire. I can't say it loud enough, get an infrared thermometer. James has good ones, if you can't wait go to Harbor Freight. You need to know whats going on during curing.. Once I kept the oven warm for a few days I then moved to fires.

Chris

PS regarding the dial thermometer, I have a small hole drilled in my makeshift door and only use the thermometer for post fire temps.. I build the fire and go more or less full tilt boogie till I get to pizza, dome clearing temps, and then back down on the wood. During these heat cycles I use the infrared thermometer to get floor and dome temps. I'm still a bit of a newbie with only 30 or so good fires under my belt, so I'm still learning..

Last edited by SCChris; 03-24-2010 at 08:58 PM.
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  #142  
Old 03-25-2010, 08:05 PM
Serf
 
Join Date: Dec 2009
Location: west hills
Posts: 3
Default Re: Oven Curing

I have lit 2 small fires and today I cleaned out ash and my floor was very moist.I am going to start over.I have not added my perlite over 3 rows of blanket yet since i was waiting to cure first in case of damage.i am on the beach in Malibu and I think the moisture is going to be an ongoing problem.I hope a door will keep the moisture out but does the curing process need to start over every time it gets wet inside dome.I am going to top off the oven with the fill and then start over with the lamps and ect..Any ideas on being at the beach as I am sure people are in rain areas and have simalar problem.
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  #143  
Old 03-25-2010, 08:35 PM
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Les Les is offline
Il Pizzaiolo
 
Join Date: Sep 2005
Location: Carson City, NV
Posts: 2,799
Default Re: Oven Curing

Quote:
Originally Posted by mlmasonry View Post
.I hope a door will keep the moisture out but does the curing process need to start over every time it gets wet inside dome..
James lives next to the ocean as well - I am confident that he does not bother. The whole point of curing was to drive moisture out of the fresh mortar joints. If you do a fair job of enclosing your oven, I think you will be good. In reality, it's impossible to keep humidity out of these things.

Les...
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  #144  
Old 03-26-2010, 03:07 AM
Il Pizzaiolo
 
Join Date: Mar 2009
Location: USA
Posts: 1,436
Default Re: Oven Curing

Quote:
.I hope a door will keep the moisture out but does the curing process need to start over every time it gets wet inside dome.
Quote:
The whole point of curing was to drive moisture out of the fresh mortar joints. If you do a fair job of enclosing your oven, I think you will be good. In reality, it's impossible to keep humidity out of these things.
I agree with Les,, The initial cure was to get the moisture out of the block and mortar of the oven, It has cured and in my opinion will be fine, and any new moisture that gets in will certainly be driven out every time you fire it up...
Relax And Enjoy
Mark
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  #145  
Old 03-26-2010, 07:13 AM
Il Pizzaiolo
 
Join Date: Jun 2009
Location: So. Orange County, CA. USA
Posts: 1,155
Default Re: Oven Curing

We have a good amount of moisture most evenings here and I think your going to be fine once you get through the curing.. Once your through the curing, if you want to you could consider running a light bulb inside the oven to keep the moisture at bay, I know some boat owners in the harbor do this to help keep things dryer. I have entertained a solar panel running a heater in my oven mostly because I wonder if I could keep the temps up over 180. At this temp lighting a fire should be a snap not to mention oven dried tomatoes.. Along those same lines, when you get further along, try to remember to pre-load your oven with firewood when the temps get down below where your cooking. This helps to dry the wood and really helps a great deal to get the next fire going. Your biggest battle may be keeping your firewood dry enough to catch quickly.

Chris
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  #146  
Old 04-02-2010, 03:22 PM
Serf
 
Join Date: Mar 2010
Location: Pleasanton CA
Posts: 4
Default Re: Oven Curing

James,

I purchased a Primavera 60 last month and went with the curing process that was with the oven's DVD. It differs greatly than what you recommend here, including that you should keep the fires burning as long as possible (not get to temperature and then let the fire die out and the oven temp drop all the way down).

Anyway, I'm concerned because I have finger tip sized holes in the side of the dome (about 20 total). They are about 1 inch deep. I stopped by Forno Bravo over the weekend and they gave me some patching compound, but obviously I'm concerned. I don't have cracks. What would cause these holes?

~Ed
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  #147  
Old 04-02-2010, 08:56 PM
Peasant
 
Join Date: Jul 2009
Location: Melbourne Australia
Posts: 39
Default Re: Oven Curing

Quote:
Originally Posted by elecco View Post
James,

I purchased a Primavera 60 last month and went with the curing process that was with the oven's DVD. It differs greatly than what you recommend here, including that you should keep the fires burning as long as possible (not get to temperature and then let the fire die out and the oven temp drop all the way down).

Anyway, I'm concerned because I have finger tip sized holes in the side of the dome (about 20 total). They are about 1 inch deep. I stopped by Forno Bravo over the weekend and they gave me some patching compound, but obviously I'm concerned. I don't have cracks. What would cause these holes?

~Ed
It sounds like a fault in the cast its self, It sounds as though the cast may of had air bubbles in the mix for something like that to happen especially so because theres so many. If you cured it to fast it would crack but I have never heard or read anything about a WFO developing holes in it due to curing.

P.s. Do the holes go right through the cast?

Regards
Dean
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  #148  
Old 04-02-2010, 09:31 PM
Serf
 
Join Date: Mar 2010
Location: Pleasanton CA
Posts: 4
Default Re: Oven Curing

Quote:
Originally Posted by Wheels1974 View Post
It sounds like a fault in the cast its self, It sounds as though the cast may of had air bubbles in the mix for something like that to happen especially so because theres so many. If you cured it to fast it would crack but I have never heard or read anything about a WFO developing holes in it due to curing.

P.s. Do the holes go right through the cast?

Regards
Dean
Yes, they go through the cast. I've attached a couple of photos.

~Ed
Attached Thumbnails
Oven Curing-oven3.jpg   Oven Curing-oven4.jpg  
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  #149  
Old 04-02-2010, 09:35 PM
david s's Avatar
Il Pizzaiolo
 
Join Date: Mar 2007
Location: Townsville, Nth Queensland,Australia
Posts: 4,519
Default Re: Oven Curing

They look like voids in the casting, usually caused by insufficient vibration in the manufacture. Shouldn't really effect it much, although too many voids lead to lower strength.
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  #150  
Old 04-02-2010, 09:37 PM
Journeyman
 
Join Date: Jun 2008
Location: Melbourne Australia
Posts: 399
Default Re: Oven Curing

Looks like a bit of thermal shock, heated up a tad quick. The holes are only cosmetic, not really that bad, i wouldnt worry about. Sounds like the oven hasnt had a lot of air drying also. maybe James may have to speak to his manufacturer?
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