• Home
  • About Us
  • Our Story
  • Products
    • Permacure CCA
    • Permacure ACQ
    • Permabore Boron
    • Waterguard Wax
    • Close
  • Services
  • Digital Solutions
    • Digital Tools
    • Close
  • Contact Us
  • search icon
    • Close
  • Dolphin Bay white icon
  • GET IN TOUCH
  • CUSTOMER APPLICATION FORM
Menu
  • Dolphin Bay logo
  • CCA treated timber iconPermacure CCA
  • acq preservativesPermacure ACQ
  • Dolphin Bay ServicesServices
  • Dolphin Bay NewsNews
  • Dolphin Bay NewsNewsletters
  • pressMedia
  • OurBlogOur Blog
  • dolphin bay icon
Apr 29
Dolphin Bay

HOW TO ACHEIVE OPTIMAL RETENTION

  • April 29, 2017

Achieving the recommended retention levels of chemical is a common challenge for wood treaters, and one that is exacerbated by the effects of a changing climate on the structure of timber.
However, the challenge can be addressed by careful quality control. In this article, our analytical chemist and lab manager Navi Moodley unpacks the problem and explains how to achieve optimal retention.
There are several factors influencing the extent to which your timber retains chemicals during the treatment process. Drier climactic conditions result in trees with a greater proportion of heartwood and less sapwood than periods of normal rainfall, explains Navi. Poor soil also leads to more heartwood.
The sapwood ratio is an important factor affecting retention because wood preservative chemicals can penetrate sapwood but not heartwood. If your timber has a greater proportion of heartwood than you anticipated, your retention levels are bound to be lower, unless your calculations take the change into account.
“The solution to the problem is to do all the necessary measurements and calculations accurately,” says Navi.
The first step  is to work out the proportion of sapwood in your timber using a sapwood-heartwood indicator. This should be done regularly, or at least whenever there is a change that might affect your timber, including a change of season, timber species or supplier. If you do not have sapwood indicators, Dolphin Bay can provide you with them.
The sapwood ratio is proportional to solution uptake, and enables you to calculate the maximum solution uptake using treatment charge sheet data.
Taking this into account, along with the recommended retention levels, you will be able to calculate the solution strength that will ensure adequate retention.
In order to help our clients achieve proper retention levels, Navi has produced a technical report which explains the relationship between retention, solution uptake and solution strength, and also provides the necessary equations.
The report also contains a table of minimum solution strengths for various retentions at different solution uptake values.
Your Dolphin Bay sales representative will be able to provide you with more information should you require. Alternatively, our technical representative will be able to assist you onsite

  • Author
  • Recent Posts
Bertus Coetzee
Latest posts by Bertus Coetzee (see all)
  • QUANTUM FIELDS – THE POWER OF INFLUENCE - April 30, 2018
  • PLAN FOR LONGER SHIPPING LEAD TIMES - April 30, 2018
  • CUSTOMERS WELL PREPARED AS INSPECTOR VISIT - April 30, 2018

Comments are closed.

Welcome to Dolphin Bay Brief which delivers the latest news and insights about our sector, related industries and the broader economy in which we operate.

IN OTHER DOLPHIN BAY NEWS

  • VISIT OUR QUALITY PLEDGE WEBSITE
    VISIT OUR QUALITY PLEDGE WEBSITE
  • DANIEL SILKE – HOW TO SURVIVE JUNK
    DANIEL SILKE – HOW TO SURVIVE JUNK
  • SUPPLY AGREEMENT WITH GREEN RESOURCES
    SUPPLY AGREEMENT WITH GREEN RESOURCES
  • OUR BEST WISHES FOR 2018
    OUR BEST WISHES FOR 2018
  • HOW TO OPTIMISE YOUR TIMBER TREATMENT PLANT
    HOW TO OPTIMISE YOUR TIMBER TREATMENT PLANT
  • INSIGHT INTO THE COPPER PRICE
    INSIGHT INTO THE COPPER PRICE
  • PLANTING A TREE SYMBOLISES THE BEST IN US
    PLANTING A TREE SYMBOLISES THE BEST IN US
  • LOOKING FORWARD TO SERVING YOU IN 2017
    LOOKING FORWARD TO SERVING YOU IN 2017
  • FOR ADEQUATE RETENTION, TEST POLE DENSITY
    FOR ADEQUATE RETENTION, TEST POLE DENSITY
  • GREEN RESOURCES SIGNS QUALITY PLEDGE
    GREEN RESOURCES SIGNS QUALITY PLEDGE

FILTER BY NEWS CATEGORY

  • Our Company
  • Our Customers
  • Our Industry
  • Our Society

Dolphin Bay icon

Dolphin Bay is committed to serving our industry, in order to ensure the growth of your business and ours. We are industry experts, constantly monitoring national and international markets for new trends and developments.

SIGN UP

CONTACT INFO

Voorbaai Crescent, Bayview Industria, Mossel Bay Phone: +27 (0) 44 6951575 E-Mail: info@dolphinbay.co.za Web: www.dolphinbay.co.za
Website designed and developed by One Hundred Percent - Design and Marketing Consultancy
This site uses cookies: Find out more.