Solar Shades provide great benefits but are easily misunderstood. Here's a quick Summary.
Privacy and UV Protection needed more than glare or light control.
Weak on view, strong on design, privacy & UV protection.
Fenestration Factors: (data available on most solar shade fabrics)
Openess Factor - % of air vs Fiber
Transmission - less is better for comfort & glare reduction.
Reflectivity - Higher is better for for energy savings
Absorption - Light/energy dissipated into the shade
UV- Ultra Violet - the sun's most damaging spectrum
UV Protection - a 5% openess factor shade blocks 95% of the UV providing excellent protection from sun damage/fading.
Energy Savings is obtained by the fabric with the maximum reflectivity. Reflective backed fabrics range up to about 77% reflective where similar fabrics in dark colors are in the 4 to 5% range. White fabrics are more reflective than dark fabrics but have the drawback of more transmission and less view.
Glare protection in obtained by minimizing the light transmission. Dark colored solar shades are much better than light colored shades. Openess also is a consideration but color is most important.
Privacy is a subjective factor that isn't quantitative. Most sheer fabrics are private in the daytime when it is bright outside and dark inside or at night when outside lighting is on but not interior lighting. No solar shade is private at night when bright lights are inside. Decorative fabrics can be translucent or opaque providing privacy and/or blackout.
View is best through dark solar shade fabrics with greater openess factors. Reflective backed fabrics also provide excellent view regardless of color.
Comfort is a combination of glare, heat and privacy. Sometimes a sheer fabric can provide separation from areas giving the perception of security and comfort. The elimination of glare and heat can make an area much more functional.
Security is enhanced by eliminating view into the property - occupied or vacant.