一.Product description : neutralizer LT-703 is dedicated to reducing residue in the plate surface and pore wall of oxidants (including Mn7 +, Mn6 + and Mn4 +), so the remnants of oxidizer will not be brought into the way the chemical brass, copper chemical quality protection.
二: 1. The reduction superior performance, and can effectively remove Mn7 +, Mn6 + and Mn4 +.
2. No inner copper oxide erosion caused pink circle.
3. Control scope and operation simple.
三.Physical and chemical properties : neutralizer LT-703 is a non-combustible liquid acid, the main features are as follows :
1. Color : Colorless transparent
2.PH value (approximately) :2-3
3. The proportion (approximately) :1.000 - 1.100
四.Bath preparation : (according to the following steps)
1, by adding distilled water or deionized water to 85% (volume ratio);
2, by adding AR-concentrated sulfuric acid and 3% (volume ratio), and stir evenly;
3, by adding neutralizer LT-703 20% (volume ratio);
4, the final increase in distilled water or deionized water to work calibration, and stir evenly. (Joined in concentrated sulfuric acid, due care must be slow to join)
五.Equipment requirements :
Trough : polypropylene (PP)
Rack : stainless steel (SS316)
Heating : quartz, polytetrafluoroethylene or PTFE sets heater
Filter : polypropylene (PP)
Ventilation : the need
Shock : Recommended
Production conditions :
Temperature 35-45-45 ° C
Time : 4-6min
Mixing : mechanical Mobile (swinging rate of not less than 5cm)
Filter : 5-10um polypropylene (PP) filters recycled
Ventilation : Device ventilation systems to remove Bath steam.
六.Pai plate approach : PCB should vertical ground row in the shelves, and swinging into 5-10 ° angle to allow circulation hole solution.
After washing of : countercurrent-washed, washed each time for 1 - 3 minutes.
Control Add : LT-703 on the work, mainly in its intensity and acidity control add :
Concentration control;
Added : handling 100m2 per PCB (plate size), add 4L LT-703 Solution;
With control of acidity-1 .5 N
Added : handling 100m2 per PCB (plate size), add 0.15L AR-concentrated sulfuric acid; Or liter fluid inclusion 5ml AR-concentrated sulfuric acid, acidity can improve results.
For trough conditions : working fluid handling liter 10-20m2 (plate size), the proposed re-allocation slot.
七.Acidity analysis :
(A) to the Pharmacy :
1,0.1% of the methyl red indicator (Methyl Red)
2,1 N sodium hydroxide (NaOH)
(B) analysis steps :
1,precise volume of 10ml from the LT-703 working fluid, placed in a cone-shaped 250ml bottle;
2, by adding 100 ml distilled water or deionized water;
3, by adding a few drops of methyl red indicator;
4 ,to 1N sodium hydroxide titration to the solution into a yellow color to date.
(C) is calculated as follows :
The use of sodium hydroxide ml × sodium hydroxide concentration (1N)
Acidity (N) = ml sample (10ml)
Inventory conditions : the drugs to be stored in dry and Celsius temperature of 10-32 ° C, to avoid sunlight and away from fire, and special attention must be basic drugs and oxidizer stored separately. In storage, removable tops to the air and stack up maximum of not more than two floors. The drugs usually stored for six months, when the use of non-removable tops open.
Note : When using neutralizer LT-703, please wear protection gloves, goggles and anti-acid clothes, medicines and avoid contact with skin or eyes. If James and inadvertently skin or eyes, please immediately with plenty of cold water rinse clean, serious treatment as soon as possible for medical treatment.
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