The following table indicates the kind of colored lenses which should be used to nullify or prevent any injury to the eyes from the industrial processes tabulated below,

Group

Process

Approx. Temperature (F.)

Correct Color*

Open-Hearth Steel

Charging machine

3400°

S + A Z

Steel pourers

2800°

S + A A

Platform men

3000°

S + A Z

Melters

2800°

Special blue

Crucible Steel

Melting floor

3400°

S + A Z

Hand-pouring

2800°

S + A Z

All-steel pouring

2800°

S + A A

Bessemer Steel

Pulpit operators

3600°

Bessemer

Blowing steel

3600°

"

Pouring in molds

2800°

S +A A

Blast Furnace Steel

Tapping

2800°

S +A A

Tuyeres

3500°

Special blue

Wrought Iron

Puddling Furnace

2800°

S + A A

Furnace

Gas heating

2500°

A K + D

Electric heating

5000°

S +A A

Large electric heating

6000°

S +A Z

Welding

Oxyacet. cutting

4000°

S +AA

Oxyacet. welding

4350°

S + A Z

Light spot welding

S + A A

Heavy spot welding

S + A Z

Iron arc welding

5500°

S + A Z

Carbon arc welding

6450°

Arkweld

Lapweld

-

A K + D or S+AA

* Symbols used by opticians.