Saturdays Woodworking Quiz April 22, 2017

[Ralph Allen Jones]

Good Morning Friends,

I have not been able to upload any pictures from last Saturday but will soon I hope,

 

Now for the quiz; What causes spalting in wood?

Edited December 6, 2017 by Ron Dudelston
tags added

[Wirebender]

Mornin' Ralph -

 

Spalting is any form of wood coloration caused by fungi.

 

Dave.

[HandyDan]

35 minutes ago, Wirebender said:

Mornin' Ralph -

 

Spalting is any form of wood coloration caused by fungi.

 

Dave.

 

Wow! Glad you're back Dave.  Missed you!

Dave's answer is spot on.  Here's an example.

 

 

[DAB]

When you have a party, always invite the mushrooms. 

 

They are fungis!

[lew]

40 minutes ago, DAB said:

When you have a party, always invite the mushrooms. 

 

They are fungis!

 

Yup, what everyone else said.

[kmealy]

A stockboy is stacking fruit on a display, when a lady asks "Do you have any
mushrooms? "

The stockboy replies "Sorry ma'am, we are out of mushrooms, but we will be getting a shipment tomorrow morning" The lady looks around some more. A few minutes later she runs back to him asking where the mushrooms are. The stockboy confused about her mental state simply tells her "Sorry ma'am, we are out of mushrooms, but we will be getting a shipment tomorrow morning" The lady looks around some more then goes back to the same stockboy and asks "Where the hell do you keep the mushrooms, I need some mushrooms right now!" The stockboy, getting frustrated with his inability to explain the situation, tells the lady "Answer a couple of questions and I will get you your mushrooms from the back." The lady agrees and the man starts the questions. "Spell cat for me, as in catastrophe " She says Ok, "C A T". "Very good!" the stockboy says, "now spell dog, as in dogmatic. " The lady getting frustrated spells it correctly. Now the employee finally asks "now spell, stink, as in mushrooms. " She replies "There is no stink in mushrooms?" To which the stockboy replies "THAT'S WHAT I'VE BEEN TRYING TO TELL YOU THE WHOLE TIME!

 

[Stick486]

Spalting. (2016, April 14). In Wikipedia, The Free Encyclopedia. Retrieved 20:21, April 22, 2017, from https://en.wikipedia.org/w/index.php?title=Spalting&oldid=715218891

 

Spalting in hardwoods - pigmentation, white rot and zone lines. Spalted wood may exhibit one or all of these types in varying degrees. Softwoods are susceptible to brown rot which degrades the wood too quickly to be used for woodworking ....

 

Pigmentation

Also known as sapstain, or in its most common form, bluestain, this type of spalting occurs when the darkly-pigmented fungal hyphae grow in the sapwood parenchyma of a tree. A visible color change can be seen if enough hyphae are concentrated in an area. These pigmentation fungi often colonize wood via the rays, but are not considered decay fungi due to their non-destructive use of easily available wood carbohydrates. The most common groups of pigmentation fungi are the imperfect fungi and the Ascomycetes. Mold fungi, such as Trichoderma spp., are not considered to be spalting fungi, as their hyphae do not colonize the wood internally.

While pigmentation fungi do not degrade the wood cell wall, this type of decay can lead to a reduction in toughness (amount of energy absorbed before breaking), and increased permeability. Pigmentation can occur on both hardwood and softwood, unlike other types of spalting which are more host specific.

White rot

The mottled white pockets and bleaching effect seen in spalted wood is due to white rot fungi. Primarily found on hardwoods, these fungi 'bleach' by consuming lignin, which is the slightly pigmented area of a wood cell wall. Some white rotting can also be caused by an effect similar to pigmentation, in which the white hyphae of a fungus, such as Trametes versicolor  is so concentrated in an area that a visual effect is created.

Both strength and weight loss occur with white rot decay, causing the 'punky' area often referred to by woodworkers. Brown rots, the 'unpleasing' type of spalting, do not degrade lignin, thus creating a crumbly, cracked surface which cannot be stabilized. Both types of rot, if left uncontrolled, will turn wood useless.

Zone lines

Dark dotting, winding lines and thin streaks of red, brown and black are known as zone lines. This type of spalting does not occur due to any specific type of fungus, but is instead an interaction zone in which different fungi have erected barriers to protect their resources. They can also be caused by a single fungus delineating itself. The lines are often clumps of hard, dark mycelium, referred to as pseudosclerotial plate formation.

Zone lines themselves do not damage the wood. However, the fungi responsible for creating them often do.

[Ralph Allen Jones]

Bingo fellows for you are on the ball for this one and thank you Stick for your generous definition on the subject. Very well done.

John Morris I inserted my address on the member map just a few minutes ago.

[Ralph Allen Jones]

Thanks John for your like and putting me on the map.

 

[John Morris]

@Stick486, I added the source for your entry on Spalted Wood. Keep in mind folks, when quoting verbatim from other sources you should source the quote. Per our guidelines at http://thepatriotwoodworker.com/guidelines/

Thanks for your understanding

 

Friendly reminder per guidelines

• Do not post copyrighted materials (articles, videos, audio, etc.) that you do not have permission to reproduce or distribute. For text articles, most of the time you may quote a small portion of the article (usually no more than 1/5 or 1/6) and you must link to the source (if online) or provide the source (if offline). Posting the entire article, even with the source, constitutes copyright infringement. This is not the place to illegally trade or distribute copyrighted (or those with questionable copyright status) video or audio clips.

[John Morris]

2 minutes ago, Ralph Allen Jones said:

Thanks John for your like and putting me on the map.

 

You put yourself on the map sir! I just turned ya Orange to a Forum Host is all.

[Gerald]

Here are a couple answers by the leading authority on spalt.

 

 

http://www.northernspalting.com/beginners-guide/

 

[PostalTom]

So John, if we come across an interesting article, is it ok to post a link to the article, along with maybe a brief description of the content, as long as we don't repost the actual article itself?

[John Morris]

On 4/23/2017 at 4:53 AM, PostalTom said:

So John, if we come across an interesting article, is it ok to post a link to the article, along with maybe a brief description of the content, as long as we don't repost the actual article itself?

So sorry Tom, I just came across this! Yes of course, links are fine. Text from the article is fine too as long as it is referenced or credited. And as long as you don't use the entirety of the text, like copy paste the whole article here.

You can use about 1/5th of an articles content here as long as you credit it with a link to the website or the name of the author. I know what your thinking, well how the heck do we know what 1/5th is! Well, just kind of look at the article, and figure 20 percent of the page.