Made in Japan

Zebra DelGuard

I realise that the blog post about the force needed for the sliding sleeve of different mechanical pencils was not very popular, so please bear with me for a similar blog post, before I get back to more traditional blog posts.

In January this year I bought the Zebra DelGuard mechanical pencil in 0.5mm. You might have come across it on Lexikaliker, where it was mentioned in October 2014. I bought mine from Japan, through Amazon Marketplace where it was sold as the Delgado pencil, instead of DelGuard, based on the Katakana spelling of the pencil’s Japanese name.

I paid £5, but I noticed that it is now available for £4.26, including free delivery.

Two different mechanisms

This mechanical pencil’s ‘specialty’ are two different mechanisms that help prevent the leads from breaking.

If there is too much axial pen force, i.e. pressure is applied to the lead towards the centre of the pen, the lead will retract, i.e. it is cushioned, somehow similar to the Faber-Castell TK_Fine Vario L.

If there is too much normal pen force, i.e. pressure is applied to the side of the lead, a protective guard will extend to protect the lead from breaking. This guard can obviously only extend a certain amount, so it is possible to break an excessively long lead, more about this later.

Axial vs Normal Pen Force
Axial vs Normal Pen Force (open in new Tab for details)

Not working as advertised?

The packaging states that ‘If you advance lead more than 4 times breakage is possible‘. I wonder whether they either explained it wrong or whether I got a dodgy DelGuard, because using my normal writing angle on my DelGuard the lead will also break if the lead has been advanced 4 times. More on the clicks later. Maybe the text should read  ‘If you advance lead 4 or more times’? Maybe other DelGuard users can comment on this.

Comparison with another mechanical pencil

I compared the pressure that will cause the lead to break to another mechanical pencil. I chose the Kuru Toga, previously mentioned here, thinking that both are from Japan, so there is a higher probability of the leads they come with being similar in terms of softness and strength [1]Comparing the breakage point to a pencil with much harder or softer lead would be less exciting.. Both mechanical pencils were tested with the leads they came with using an angle of 45°.

What force is needed to break a lead of what length.
What force is needed to break a lead of what length.

The axis at the bottom shows the lead length in millimetres, with the number of clicks marked as well. You will probably have to enlarge this image to see it well (right click and open in new tab/window). The axis on the left shows the force needed, in Newton, to break the lead.

To put things in context: The highest force needed for moving sliding sleeves was 1 N, but even to break a very long lead you need more than 2 N.

Personally I don’t extend the lead more than 0.5 mm or 1 mm, so I don’t really have problems with lead breakage anyway, but that didn’t prevent me from getting a DelGuard to marvel at the engineering ingenuity that built this pencil.

As you can see, the longer the lead extended on the Kuru Toga (red line) the easier it is to break.

For the DelGuard (blue line) it is virtually impossible to break the lead if it”s extended less than 1.5 mm, because of the guard that will extend. The dotted blue line represents the situation if you count bits of the lead being chipped off as breakage, the solid blue line represents proper breakage.

The warnings that came with the diagram from the Color Eno blog post apply here as well [2]Here’s a copy and paste: I have neither the training, nor experience, nor the equipment to take these measurements properly, so you better take these measurements with a pinch of salt, or even … Continue reading.

Leads and millimetres

One click on the DelGuard will advance the lead by ~0.52 mm, less than what you get with the Kuru Toga, where one click will advance the lead by ~ 0.57 mm and certainly less than what you got with many pencils reviewed at Dave’s Mechanical Pencils. The break safe ‘zone’ for the extended lead is therefore everything between 0 mm and 1.6 mm. I usually don’t extend the lead more than 1 mm, so the lead is quite safe, but other people might use their pencils in different ways.

Video

Please have a look at this little video I made to see the DelGuard in action (Watch in YouTube for higher resolution).

 


If you like this blog post you might also like the blog post about the Noris colour wear and tear.

 

You can find a review of the DelGuard at The Pen Addict and at That One Pen.

You can read more about Axial and Normal Pen Force in this paper. 

References

References
1 Comparing the breakage point to a pencil with much harder or softer lead would be less exciting.
2 Here’s a copy and paste: I have neither the training, nor experience, nor the equipment to take these measurements properly, so you better take these measurements with a pinch of salt, or even better with a whole lorryload full of salt.

Zebra DelGuard Read More »

Ty/iwako erasers (again)

Beanie Puzzle EraserI like a bargain. That means I do sometimes buy things if they are cheap, even if I don’t need them.

In this case I’m talking about erasers. You never know when a good eraser might come in handy [1]A variation of a sentence from the computer game Leisure Suit Larry.

This weekend I bought more Ty/iwako’s puzzle erasers.

Usually these sell for £1 (~$1.55; €1.39) each, but my local Pound World is selling four for £1.

There were lots of different packs, each with four erasers each, but all the packs had a different mix.

Please click to enlarge.


Price and exchange rates: May 2015

References

References
1 A variation of a sentence from the computer game Leisure Suit Larry

Ty/iwako erasers (again) Read More »

Pilot S20, 0.3mm, dark brown

 

s20-bodyHow could I resist… I never had much of a chance, did I?

…not with Gunther touting his readers with his beautiful S20, again and again and again.

I gave in…

s20-aluminium
If you click to enlarge you will notice tiny dents that must have occurred during manufacturing

…and bought the S20 in dark brown and in 0.3mm from WAKU1(Japan Store) for £13.52 (~$20.80; €18.20), including postage. I got it twelve days later. A great price, especially when keeping in mind that it costs more than twice as much in the UK (because it is imported) and you will have problems finding the 0.3mm version. I bought from WAKU1 in the past, but more about that in a future blog post.

The wood of the pen is beautiful and reminds me of the ONLINE All Wood Marone.

s20-f

Pilot is a bit optimistic though, offering an F in their lead grade indicator. Is there an 0.3mm lead in F? When I see F it’s usually for 0.5mm.

Please let me know if you know of a 0.3mm lead in F – I do prefer harder leads, so F would be great, even though I have to say the 0.3mm leads you get with many Faber-Castell pencils are a bit too hard and too light for my taste.

s20-staedtler


Price and exchange rates: February 2015

Pilot S20, 0.3mm, dark brown Read More »

The Mono Zero and the Mono One

Today: a comparison of different Tombow erasers – the Tombow Mono Zero, available either with a 2.3 mm round tip or broad 2.5 mm * 5 mm rectangular tip, and the Tombow Mono One, an eraser that looks as if it’s supposed to be used on a keyring or as a charm. I wrote this blog post originally for The Pen Company who send me these two erasers free of charge.

Mono Zero (back)
Mono Zero (white version, back)

Mono Zero background

The Mono Zero was originally released on 12 November 2007 and since its release it has won the iF product design award 2010 and the red dot design award 2010. It has also received Japan’s eco mark certification because of its high content of (pre-consumer) recycled plastic. The body of the eraser is made in Japan, while the eraser core itself is made in Korea. The Mono Zero has been designed by Ms. Chisato Takahashi, who  is also responsible for the Mono smart. I got mine as a free sample from The Pen Company where the current retail price is £3.47.

Mono Zero (black version, front)
Mono Zero (black version, front)

Mono Zero body

The Mono Zero is available either with a 2.3 mm round tip or broad 2.5 mm * 5 mm rectangular tip and each of these versions is available in either a black body or a black, white and blue body. There used to be a silver version as well, which – to me – always used to be by far the least attractive looking version. This silver version does not seem to be available anymore.

Mono Zero eraser removed - 2.5mm * 5 mm version
Mono Zero eraser removed – 2.5mm * 5 mm version
Mono Zero eraser removed - 2.3 mm round tip version
Mono Zero eraser removed – 2.3 mm round tip version

Mono Zero eraser

The eraser itself does not fill the whole body. This might come as a surprise when you have used other pen shaped erasers that come in a plastic body, but is not not really a problem. You do get slightly less eraser for your money, but the whole eraser (body plus eraser) itself is not expensive and the eraser core will still last a long time. Just to mention is explicitely, there are also refills available for these erasers, like for most pen shaped erasers. Labelled as an elastomer eraser, the Mono Zero contains an eraser made from ethylene propylene copolymer. When I received the eraser I did try it out and compared it to my favourite kind of eraser, a dust-free  or non-dust eraser (as long as it’s a dust-free eraser I usually like it very much). It’s probably not fair to compare it to my favourite type of eraser, or let’s say not objective – others might not like dust-free erasers, but then this comparison  is a valid approach as I am writing about what I like or dislike about the Mono Zero.

Comparison on Deli paper (A6)
Comparison on Deli paper (A6)

For the pencil to be erased by the Mono Zero – I originally thought what better match could there be for the Tombow Mono erasers than a Tombow pencil, so I picked last year’s 100th anniversary special pencil.

Erasing the soft Tombow 100th anniversary pencil
Erasing the soft Tombow 100th anniversary pencil

Mono Zero performance

To my surprise the two Tombow products, pencil and eraser, didn’t seem to be able to cooperate that well with each other. This was due to the fact that the Tombow pencil is very soft. According to Pencils and other things the 100th anniversary edition has the same lead as the current Mono 100, but my 100th anniversary pencil seems much softer (and smudges easier) than a Mono 100 (both HB). I am not sure whether I’m imagining things here, or I just happened to have a softer than usual 100th anniversary pencil and a harder than usual Mono 100, or whether the lead is the same, but there’s actually a shift in grade (e.g. 100th anniversary HB = Mono 100 B). In any case, the Mono Zero was not able to eraser a strong line, i.e. drawn with some pressure, without a trace. It did however manage to eraser strong lines of harder pencils, in this case a Staedtler Mars Lumograph in HB, without a trace.

Erasing the harder Staedtler Mars Lumograph HB
Erasing the harder Staedtler Mars Lumograph HB

Mono Zero conclusion

My impression of the Mono Zero was that it’s not the greatest performer when it comes to actual erasing (worse than a non-dust / dust-free eraser), but its strong point is precise erasing …because of the tip size and shape (a bit like a Kokuyo eraser). When I was looking for other blog posts to mention in this review I rediscovered Dave’s review of the Mono Zero, which came to the same conclusion regarding eraser performance.

A great eraser, because its fine ‘tip’ allows precise erasing, even though eraser performance itself could be better.

The Monos compared to a dust free eraser
The Monos compared to a dust free eraser

 

Mono One

The Mono One, designed by Mr Kazunori Katami, who holds a lot of stationery patents, was released slightly earlier than the Mono Zero – on 5 February 2007. The Pen Company is selling this eraser for £2.60. The body of this eraser is also produced in Japan (no eco mark certification for the Mono One, though), while the eraser itself is made in in Vietnam. Labelled as a plastic eraser, the eraser is made from thermoplastic elastomers. Despite the different materials, performance seemed pretty similar between the Mono Zero and the Mono One, with the Mono One maybe performing a little bit better.

The Mono One does not offer as precise erasing as the Mono Zero, the tip is bigger, but it is a nice size, which makes it a great eraser to carry in a pencil case bag or, possibly even on your key ring.

 


I would like to thank The Pen Company for these erasers, I got them as free samples, and Mrs. Balsewicz from Tombow Europe for all the information she has given me about these erasers.

I would like thank Sean for the Tombow 100th anniversary pencils.

The Mono Zero and the Mono One Read More »

The Tombow Zoom 707 de Luxe

I’ve been luck enough to have been chosen by The Pen Company, together with several other bloggers, to receive stationery to try out. Here’s my blog post about the Tombow mechanical pencil they sent me, originally posted on The Pen Company’s blog.

Introduction

Do you remember what you did in 1987?

If you were living in the USA you were lucky enough to be able to watch Star Trek: The Next Generation. The UK and Germany got TNG a few years later, in 1990. If you’re more into computers: the Amiga 500 was also released in this year.

..and in the world of pencils 1987 was the year the Tombow Zoom 707 mechanical pencil, designed by Mr Tsuyoshi Hasegawa, was launched in Japan, one year after the ballpoint pen of the same series came out.

Tombow tin

Awards

It only took another year before the Zoom 707 was released in Europe – in 1988. Over the next years it won three design award in Germany: the Red Dot Design Award in 1988, the Design Plus Award in 1989 and the Baden-Württemberg International Design Award in 1990.

Despite this pencil being so long on the market I didn’t know about it until recently. I got my Zoom 707 from The Pen Company as part of their programme where they send pens to stationery blogs for review. I even got the de Luxe version, which was launched in 1994. Tombow describes the de Luxe version, which sells for £28.60, around £10 more than the standard version, as being “glossy silver”.

Size comparison: Tombow Mono 100, Tombow Zoom 707 de Luxe, Staedtler Mars micro
Size comparison: Tombow Mono 100, Tombow Zoom 707 de Luxe, Staedtler Mars micro

Expectations and reality

I’ve got to be honest here, I would have never ordered this pen. The slim design doesn’t look very uncomfortable to me, so I didn’t have particularly high expectation when I started using this pen. To my surprise it was much more comfortable than expected. The rubber grip section of the pen has a diameter of 6.5mm and is not too far off a Tombow pencil’s diameter: the Tombow Mono 100 wood-cased pencil has a diameter of 7.2mm.

The grip is only slightly narrower than a wood-cased pencil
The grip is only slightly narrower than a wood-cased pencil

Build quality is excellent, but the red ball at the end of the clip and the rubber at the end of the pen show parting lines, and except the look the pencil behaves very similar to your typical mechanical pencil: with around 10g the weight is similar to other mechanical pencils. One click will advance the by about 0.6mm, which is also pretty standard and it also uses a ratchet mechanism like many other mechanical pencils.

One click will advance the lead by ~0.6mm
One click will advance the lead by ~0.6mm

The pen comes in a nice presentation tin and with a lifelong warranty. It doesn’t come with instructions, though, and since I’ve used mechanical pencils in that past that have to be refilled through the tip I wasn’t sure how to refill this pen. It’s size and  the fact that my careful attempt to remove the push top (I didn’t want to damage the pen)  were not successful didn’t help either. The push top can however be removed, to be refilled. My pen came with three leads, but despite is slim design I managed to squeeze eight leads into the pen.

Tombow refill

Overall

The Zoom 707 is one of those pens that ages well. Despite being more than 25 years old it doesn’t look old fashioned.

As far as I know this pencil is selling well. I wonder how most people are using this pencil. Its two main attributes, the slim size and the sturdiness (thanks to its metal body), make it a pencil that is probably more suitable than others to be a diary pencil, the kind of pencil you clip to your diary and leave it there to fulfil this specific purpose.

Tombow standing


I would like to thank The Pen Company for this pencil and Mrs. Balsewicz from Tombow Europe for the information she has provided about the Zoom 707.

The Tombow Zoom 707 de Luxe Read More »