[zesty]

As above,

I was told by the chemical supplier to add 16 litres of 15% hypo to my 60l drum. The rest water. For a 2% solution.

I’ve always used this and added a bit here and there to strengthen.

There must be some maths to it (obviously)

What’s the simplest way?

I used to sometimes use a calculation that was on the softwash uk forum, but just checked and it’s disappeared!

I have used the:

1 part hypo plus 4 parts water = 5.

15% hypo divided by 5 = 3% mix.

My problem is I use a 60l drum, so to get say a 1.5% mix the above maths doesn’t work as it’s more like 1 parts hypo to 8 parts water to get 1.5% ish. So how do I work that out but in a 60 litre drum?

I should have worked harder at maths in school.😂

[robbo333]

As above,

I was told by the chemical supplier to add 16 litres of 15% hypo to my 60l drum. The rest water. For a 2% solution.

I’ve always used this and added a bit here and there to strengthen.

There must be some maths to it (obviously)

What’s the simplest way?

I used to sometimes use a calculation that was on the softwash uk forum, but just checked and it’s disappeared!

I have used the:

1 part hypo plus 4 parts water = 5.

15% hypo divided by 5 = 3% mix.

My problem is I use a 60l drum, so to get say a 1.5% mix the above maths doesn’t work as it’s more like 1 parts hypo to 8 parts water to get 1.5% ish. So how do I work that out but in a 60 litre drum?

I should have worked harder at maths in school.😂

I think your maths is correct.
Pour 12 litres of water into your 60 litre container.
Make a mark, at the water level, with a permanent pen.
Tip out the water.
This will give you, your 4-1 ratio which = 5 (5 divided by 15) gives you 3% mix.
So 12 litres of hypo with 48 litres of water.


So if your pour 6 litres of water in and make your permanent mark
then tip out your water.
You'll have 6 litres of hypo and 54 litres of water, which will be 9-1 ratio (9+1 = 10) divided by 15 = 1.5 mix.

I use water as a measure (rather than hypo) because it's less dangerous, when just doing measurements.

I think that's correct.

[zesty]

Spot on mate.

👍🏼

[premier window cleaners]

Softwash Systems blend 50

[Splash & dash]

Softwash Systems blend 50

Yes very nice but over 10 k then you need a van to put it in when if you are doing small jobs a £115 backpack and a calculator are all you need 😂😂😂

[Darran Smith PRSS]

When using SH on any surface you should always neutralise it. better still neutralise and wax all in one operation will ensure no rusting and will leave the cladding super shiny for that instant WOW factor!