This actually changes the affected material's structure to make it transparent without compromising it's strength in any way. The lasting effect is not magical.

Affliction [99] 
    Advantage [+440%] 
        Invisibility [44] 
            Affects Machines [+50%] 
            Extended (IR and UV) [+40%] 
            Transparent, Like Glass [-80%] 
                Not actually invisible 
    Area Effect (2 yard radius) [+50%] 
    Selective Area [+20%] 
    Cosmic (Works on partial objects) [+50%] 
    Extended Duration (Permanent) [+300%] 
    Malediction (As Regular Spell) [+100%] 
    Based on Activation Roll [+5%] 
    Only Works on Inanimate Objects [-40%] 
    Magical [-10%] 
    Spell Components [-30%] 
        Must say "glass" in Latin 
        Must gesture with hands 
        Must hold a bit of transparent crystal or glass 
Level 2-5 [104/109/114/119] 
    Increase Area Effect by 1 step [+50%]