Kalsomine is a particular version of distemper.
Basically whiting or crushed chalk plus casein glue plus pigment.
A water-soluble paint system that had very little bond strength ... so
that once it was overpainted, the weight of the new coating was often
sufficient to pull the paint layers off the wall.
Used from the mid 19thC up until the mid 20thC - and hence can still be
the bane of renovators of early-mid 20thC houses.
David West
Executive Director
internationalconservationservices
T: +61 (2) 9417 3311
M: +61 (411) 692 696
sustaining your heritage
-----Original Message-----
From: The listserv where the buildings do the talking
[mailto:[log in to unmask]] On Behalf Of Mary Tegel
Sent: Sunday, 9 August 2009 1:20 PM
To: [log in to unmask]
Subject: Re: [BP] Rock wool insulation
Folks,
As you all ponder rock wool ( and I do wonder what mineral it is...
And it beats horse hair which I've found out here in the west), what
about "calcimite?". Maybe it goes by another vernacular name
elsewhere. I have found it on interior walls. It's often a nasty
yellowed calmine lotion color or dirty turquoise. It won't take paint
so I suspect it's plaster. ???
Mary
hands-on impresario
Tegel Design + Planning
On Aug 8, 2009, at 8:10 PM, "Becker, Dan"
<[log in to unmask]> wrote:
> The rock wool that was in the ceiling of my house additions dating
> between 1932 and 1941 was paper-backed batts on which the words
> "Rock Wool" were preceded by the word "Manville." So I've always
> been wondering what other minerals might have been contained in the
> batts in my belfrey....
>
> Dan
> _____________________________________
> ______________________________________
> From: Cuyler Page [[log in to unmask]]
> Sent: Saturday, August 08, 2009 12:37 AM
>
> In my house it is a natural mixture of fluffy grey stuff, mouse
> turds and
> sawdust chips.
>
> Mr. Google says:
> "Rock wool is a naturally-occurring mineral fibre that looks like
> chopped
> white cottony material. (It may have originally been formed by wind
> blowing
> across streams of lava from erupting volcanoes.)"
>
> cp in bc
>
> ----- Original Message -----
> From: "Ruth Barton" <[log in to unmask]>
> Sent: Friday, August 07, 2009 6:23 PM
> -
>> Can anyone tell me what "rock wool" insulation is composed of?
>> Thanks,
>> Ruth
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