M SORA d.d. je podjetje z dolgoletno tradicijo. Njeni začetki segajo v leto 1948, ko je bila oblikovana kot zadruga. Mizarsko podjetje se ji je pridružilo leta 1985 in s tem zasadilo osnovo današnjega uspešnega podjetja poznanega predvsem po izdelavi lesenih in les-alu oken in vrat. Podjetje (brez hčerinskih podjetij) ima 180 zaposlenih in je razdeljeno v tri glavne enote: Mizarstvo, Norica (dobavitelj in zastopnik številnih materialov potrebnih za izdelavo oken) ter Trgovine (trgovine z živili, trgovine z gradbenim materialom). 

 

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What do LEOPARD SPOTS do on the glass?

January 19, 2018

Anisotropy, iridescence, strain patterns or leopard spots are all descriptions of the rainbow stains, that can appear on the glass. In general the anisotropy describes the characteristic of specific surfaces, which can change its color, depending on the angle of observation. The effect is most visible by soap bubbles, on butterfly wings and on seashells.

Source: https://sl.wikipedia.org/wiki/Iridescenca

 

Rainbow stains appear due to the change of the stress state in the glass, during the tempering process. Any uneven heating, cooling or uneven transporting of the glass on the rollers may lead to the anisotropic effect. The more nonhomogenic the process the bigger the effect. Glass manufacturers are not able to maintain 100 % even tempering process, but are working on optimisation constantly. By polarization of light, strain patterns can cause the double breakage of the light. While observing such tempered glass and with special light conditions, we can detect polaroid fields in different shapes. This phenomenon applies only for tempered and semi-tempered glass.   

 

Despite the fact, that anisotropy phenomenon is part of technological process, cutomers do not want to accept visual anisotropy as part of the glass. Glass standard describes anisotropy as glass effect and not as glass defect. The whish of glass manufacturers, window manufacturer and also customers is the same – to develop processes, which will enable glass production without leopard spots.

 

 

 

 

 

 

 

 

SOURCE:

https://sl.wikipedia.org/wiki/Iridescenca

https://www.glastory.net/anisotropy-defect-heat-treated-glass/13.01.2018

http://www.reflex.si/si/files/default/knjiga-gradimo-s-steklom/Gradimo_s_steklom_Book_SLO_web.pdf

 

Source: https://www.glastory.net/anisotropy-defect-heat-treated-glass/13.01.2018

 

 

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