David Parker on Epoxy PBO August. What on earth was THAT?

[jfkal]

He says: 5 pump stroke of resin and 1 pump stroke of hardener.
Total nonsense.
Even on the photo one can see that the pumps are of different size ).
So one stroke of the resin pump delivers 5 times as much as one stroke
Of the hardener pump!
One wonders whether he has ever done an actual epoxy repair job EVER?

 

[Topcat47]

I suppose it depends on the supplier. I use SP which comes with graduated pumps, one stroke of each gives the right proportions.

 

[PuffTheMagicDragon]

Surely it depends on the size of the pump and not on the size of the container, no? I haven't seen the article so I may be wrong.

 

[Suttle]

Havn't seen the article either but recall that West epoxy use a 5:1 ratio or resin to hardener.

 

[vyv_cox]

The West system website http://www.wessex-resins.com/westsystem/dispensing-mixing.html clearly says one pump per component and goes on to say that the ratio is 3:1 by volume. I have used West many times and have the dispensers, always used them in this way.

 

[Lakesailor]

See thread in the Lounge about Sunday Times journo getting it wrong.

Even if he was correct, and using the same size pump for each component, he should point out that the user should check the user instructions for the system they are using.

 

[2nd_apprentice]

The West system website http://www.wessex-resins.com/westsystem/dispensing-mixing.html clearly says one pump per component and goes on to say that the ratio is 3:1 by volume. I have used West many times and have the dispensers, always used them in this way.

I'm surprised you say that, following your own link:

To measure 105 Resin and 205 or 206 Hardener by weight, combine five parts resin with one part hardener. Small quanities can be mixed by volume at the same ratio. To measure 105 Resin and 207 or 209 Hardener by volume, combine three parts resin with one part hardener (by weight, 3.5 parts resin : 1 part hardener).

Obviously it depends on which hardener was used.

Even if he was correct, and using the same size pump for each component, he should point out that the user should check the user instructions for the system they are using.

+1

 

[VicS]

I suppose it depends on the supplier. I use SP which comes with graduated pumps, one stroke of each gives the right proportions.

The West system website http://www.wessex-resins.com/westsystem/dispensing-mixing.html clearly says one pump per component and goes on to say that the ratio is 3:1 by volume. I have used West many times and have the dispensers, always used them in this way.

It depends on the make and type

Like Vyv I have West resins and a pair of pumps which deliver the correct ratio with 1 stroke from each

SP Resins supply different pumps according to the pack size. Their mini pumps, supplied with the 1kg pack size, are the same size, requiring 5 strokes of resins to 1 of hardener. Those with the 3 kg pack require one stroke of each.


The mis-information in PBO articles is one of the reasons I stopped taking it on a regular basis

 

[Amulet]

Tried to delete my erroneous post - won't seem to let me so this is my solution.

 

[cliff]

See thread in the Lounge about Sunday Times journo getting it wrong.

Even if he was correct, and using the same size pump for each component, he should point out that the user should check the user instructions for the system they are using.

He should be banned from ever posting anything again in any of the IPC magazines (apart from a humble apology for being a ******)- that'll teach him to tell ½ truths. I mean if an esteemed forumite on here can be banned by a local rag for asking an honest question should we not demand a higher standard. I mean one can partly understand a local rag not having the knowledge to accurately portray the news but one would have thought IPC were above such and would have some sort of peer review in place before allowing anything through to the print room - perhaps the editor should be suspended and sent to IPC dungeons to reflect on his lack of diligence.
Come on let's have a witch hunt.... FFS the journo made a mistake and/or the editor changed the original script or what ever, it is not the end of the world, or is it?
Honestly, does anyone actually believe what any journo writes?

 

[vyv_cox]

Now that I have had a quick look at the article I think the criticism is unjustified. OK, he may have made a small error about the number of strokes of the pump, although for all we know with some systems that may not be an error at all. However, the majority of the article, quite a long one, is interesting, accurate and useful. Suggesting that he has never used it is clearly nonsense, as he shows plenty of photos to illustrate that he has.

 

[cliff]

Now that I have had a quick look at the article I think the criticism is unjustified. OK, he may have made a small error about the number of strokes of the pump, although for all we know with some systems that may not be an error at all. However, the majority of the article, quite a long one, is interesting, accurate and useful. Suggesting that he has never used it is clearly nonsense, as he shows plenty of photos to illustrate that he has.

Well put Viv, but that does not mean some folk cannot have a good witch hunt just for the fun of it. I nominate JFKAL as "Witchfinder General"

 

[Lakesailor]

Now that I have had a quick look at the article I think the criticism is unjustified. OK, he may have made a small error about the number of strokes of the pump, although for all we know with some systems that may not be an error at all. However, the majority of the article, quite a long one, is interesting, accurate and useful. Suggesting that he has never used it is clearly nonsense, as he shows plenty of photos to illustrate that he has.

Yes, quite true. But I still stand by my opinion that he would have been wise to caution users to read the instructions with their own preferred system. As we can see from these forums people will take things at face value.

 

[vyv_cox]

Yes, quite true. But I still stand by my opinion that he would have been wise to caution users to read the instructions with their own preferred system.

He does do exactly that.

 

[Lakesailor]

I haven't seen the article and you are the first person to mention it. No problem then.

 

[jfkal]

Thanks. I feel honored. Regardless when you write an article you should get stuff right and if unsure get it reviewed before printing. IMHO

 

[savageseadog]

Having found the pumps and cleaning of them far too demanding, I use soup tins and a calibrated stick. I have heard people say the pumps don't reliably pump the correct amount?

 

[Alfie168]

My father in law imports a 2 pack epoxy fishing rod finishing 'varnish' which he has used in his own rod manufacture for ages with great success. He also sells silicone free (essential) syringes as the mixing accuracy is critical and normal syringes contaminate the mix. Whenever he sold some to a new user he stressed the importance of accuracy of measurement and the need for silicone free syringes.

It was amazing how many people thought they knew better and then complained the product was rubbish. However...once they OBEYED the instructions.....their attitude changed considerably and for a time most UK rod makers used it until fashions moved on to matt finishes.

It was...as they say.....a learning curve.

Tim

 

[Lakesailor]

The epoxy I use is 2:1 so a measured stick is easily accurate enough.

 

[oldbilbo]

Thanks. I feel honored. Regardless when you write an article you should get stuff right and if unsure get it reviewed before printing. IMHO

Part of the difficulty is that PBO Magazine does have people who review and precis submitted articles. In their 'chopping and changing' to make text fit the spaces they've allocated, they frequently excise material essential to clear understanding of the author's intent, and even more frequently substitute shorter text they fondly presume has the same meaning as the original. Often, it doesn't....

It may well be that contributor David Parker is not the author of the errors. Ultimately, the Editor takes responsibility for what he publishes - and for the errors and omissions of his team.