Stop Sign and Custom Metal Stop Signs from the Online Leaders

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Let's Compare Stop Sign and Parking Sign Materials.


	Engineer Grade (silver/ white)	High Intensity (silver/ white)	Diamond Grade (silver/ white)	Diamond Grade (fluorescent Yellow)	Diamond Grade (fluorescent yel./green)

How Bright Is the Sign?

By Day	27	34.8	40	45	60	This measures a sign "Cap Y" Value, a common way to determine how dull or bright the sign is during the daytime. Shown here is the minimum Daytime Luminance Limit y%.

At Night(for car or SUV)	30	90	400	240	320	This measures, approximately, the reflectance of a sign, when seen by the driver of a car or SUV. For the car, the reflectance is higher, for an SUV, the reflectance is lower. In particular, the amount shown here is the coefficient of retroreflection as measured in candelas per footcandle per sq ft at an observation angle of 0.5º and an entrance angle of -4º.

At Night(for a truck)	-	10	120	72	96	Like above, but the values here approximate the reflectance of the Stop sign for a driver of a truck. Note, however, that a truck typically observes a sign at an angle of 0.8º and the measurements here are actually at an observation angle of 1.0º and entrance angle of -4º.

At Night (whenseen at an angle)	30	175	215	130	170	Many times a stop sign is seen at an angle. The values here are the measurements here are actually the candelas per footcandle per sq ft for the stop sign at an observation angle of 0.3º and entrance angle of +30º.

How Durable is the Sign?	7 years	10 years	10 years	10 years	10 years	Traditional warranty period. In practice, many signs last longer. Yet, in certain climates, your sign may degrade at a faster rate.

Used for Stop Signs?

Retroreflective Sign Element	Beads	Prismatic	Prismatic	Prismatic	Prismatic	There are two basic technologies used for reflective stop signs or other parking signs – glass beads or prisms.

3M Material Used for Signs	3270	3930	4090	4081	4083	This is the typical material from 3M used for these types of signs.

3M Product Bulletin				4000 Series