Duringthistime,researchesweregoingoninthisfieldmainlyfortworeasons,toputastopto
the injuries caused by sharp glass fragments and toreduce the effect of UV radiations.
Nowadays,urethanesealantisusedtofittheglasstotheframebecauseofthewater-resistant
propertiesshownbyit.Abandofdarkdotsareintroducedattheedgeofthewindscreento
preventtheadhesivefromUVrays.Ithelpsindecreasingthethermalstressontheglassand
also provides a sunshade effect.
Overthe years,therewereseveraleffortstoreducetheeyestrainonthedriver’seyewhile
drivingduetosun;thisledtothediscoveryoftintedglassandsunfilms.Sunfilmisintroduced
overtheregularglass,absorbingsomepercentofsunradiation;thusdrivercanseewithout
anystrain.Butinmanycountries,lawswerepassedtodiscouragetheuseoftintedglass.One
suchcountrywasIndia.In2013,thehighestcourtofIndiabannedtheuseoftintedglassand
sunfilmstoreducethecrimesthattookplaceinmovingcars.Asalternativewindshieldsnow
have a portion of tinted glass in the uppermost partto decrease glare.
Wearealsofamiliarwiththeconceptofbulletproofglass.Itisatypeofglassthatdoesn’tallow
aprojectiletopassthroughit.Itismadeupofseverallayersofglass,butthemajorityoftwo
kindsofglassareusedtomanufactureit.Onetypeissoft,andtheotheroneishard,thesoft
oneincreasestheelasticityoftheglass,orinotherwords,itstretchesinsteadofbreakingwhen
a bullet tries to penetrate it.
It is an ongoing field of study and is prone to manysuch discoveries soon.