Anakdenesor

Kenapa Buku Bertukar kepada Warna Kuning dan Cara untuk Mengatasinya

Buku adalah salah satu aset berharga bagi pencinta ilmu dan pembaca. Namun, pernahkah anda memperhatikan bahawa halaman buku yang anda simpan lama kelamaan berubah warna menjadi kuning? Fenomena ini bukan hanya sekadar perubahan estetika, tetapi juga tanda proses alami yang terjadi pada kertas. Post kali ini akan membahas mengapa buku bertukar warna menjadi kuning dan langkah-langkah efektif untuk mencegahnya.

Koleksi daripada library

Mengapa Halaman Buku Bertukar Warna Menjadi Kuning?

Kandungan Lignin dalam Kertas- Kertas dibuat dari serat kayu yang mengandung lignin, iaitu sebatian organik kompleks yang terdapat dalam dinding sel tumbuhan, khususnya kayu dan kulit pokok. Ketika lignin terkena oksigen dan cahaya matahari, ia mengalami proses oksidasi yang menghasilkan warna kuning.
Paparan Cahaya Matahari- Cahaya ultraviolet (UV) dari matahari mempercepat proses oksidasi lignin. Oleh karena itu, buku yang disimpan di tempat terang cenderung menguning lebih cepat.
Kelembapan Udara- Kelembapan yang tinggi dapat mempercepat kerusakan pada kertas, termasuk perubahan warnanya. Udara lembap memungkinkan pertumbuhan kulat yang juga merosak struktur kertas.
Kualiti Kertas Buku- dengan kertas berkualiti rendah, seperti yang digunakan pada buku-buku murah, memiliki kandungan lignin yang lebih tinggi dibandingkan dengan kertas berkualiti premium.

Cara Mengatasi dan Mencegah Halaman Buku Menguning

Berikut adalah beberapa cara efektif untuk menjaga buku anda dan mencegah halaman berubah warna:

Simpan buku di tempat yang Sejuk dan Kering

Pastikan rak buku berada di ruangan dengan suhu stabil, tidak terlalu panas atau lembap. Gunakan alat pengukur kelembapan (hygrometer) jika perlu.

Hindari Paparan Langsung Cahaya Matahari

Simpan buku di tempat yang teduh atau gunakan penutup kaca dengan lapisan anti-UV pada almari buku anda.

Gunakan Silica Gel

Silica gel dapat menyerap kelembapan di sekitar buku, sehingga mencegah pertumbuhan kulat dan kerosakan kertas.

Bersihkan buku secara rutin

Gunakan kain lembut untuk membersihkan debu yang melekat pada buku. Debu yang melekat pada buku dapat menarik kelembapan dan mempercepat proses oksidasi.

Gunakan sampul plastik

Sampul plastik dapat melindungi buku dari debu dan kelembapan. Pastikan plastik yang digunakan tidak beracun dan bebas dari bahan kimia yang dapat merosak kertas.

Semoga dengan tips in dapat membantu anda mencegah Dan melambatkan prose's penguningan Kertas Buku.

December 11, 2024

4 Comments

Skincare

Wellage Real Hyaluronic Cream & Real Hyaluronic Blue Ampoule

Recently I have been invited to do a collaboration with a Korean brand skincare called WELLAGE. Wellage is a Korean skincare brand under Hyundai Bioland, a leader in biotechnology and skin research. Founded in 1995, Bioland specializes in developing natural, bio-derived ingredients, making Wellage a brand rooted in innovation and sustainability. Wellage’s philosophy emphasizes maintaining healthy skin by combining advanced biotechnology with skin-friendly, effective formulas. The brand gained popularity for its focus on hydration, anti-aging, and barrier-strengthening solutions.

Real Hyaluronic 100 Cream

The first product is Real Hyaluronic 100 Cream. This cream is a moisture-rich cream designed to deeply hydrate and plump the skin. It incorporates advanced technology to deliver hyaluronic acid into the skin layers, ensuring long-lasting hydration and elasticity. Suitable for most skin types, especially dry and dehydrated skin, it serves as a versatile option for both daytime and nighttime skincare routines.

Key Ingredients and Benefits

Hyaluronic Acid Complex

Includes various molecular weights of hyaluronic acid to penetrate and hydrate multiple skin layers.
Helps retain up to 1000 times its weight in water, offering intense moisturization

Ceramides

Strengthen the skin barrier and lock in moisture, protecting against environmental stressors.

Panthenol (Provitamin B5)

Soothes and calms the skin while enhancing hydration retention.

Madecassoside

Derived from Centella Asiatica, this ingredient provides anti-inflammatory and skin-repairing properties.

Texture and Application

The cream has a lightweight yet creamy texture that absorbs quickly without leaving a sticky residue.
It delivers an immediate cooling sensation, making it refreshing to use, especially for dry or irritated skin.
Can be used as the last step in your skincare routine or under makeup for a smooth base

Real Hyaluronic Blue Ampoule

The Real Hyaluronic Blue Ampoule by Wellage is another hydration-focused product from the brand, complementing the Real Hyaluronic Cream. This ampoule is designed to deliver concentrated hydration, helping to restore skin vitality and elasticity through a high-potency formula.

The Real Hyaluronic Blue Ampoule by Wellage is a targeted hydration solution designed for deep moisture replenishment and skin barrier reinforcement. This ampoule is suitable for all skin types, particularly those with dry, dull, or fatigued skin, as it provides an immediate boost of hydration and glow.

Key Ingredients and Benefits

Hyaluronic Acid Complex

Contains multiple molecular weights of hyaluronic acid for comprehensive hydration across different skin layers.
Instantly plumps the skin, reducing the appearance of fine lines caused by dehydration.

Blue Capsule Technology

The "Blue" aspect refers to microcapsules containing active ingredients that burst upon application, maximizing absorption.
This ensures a fresh delivery of potent hydration and nutrients with every use

Niacinamide (Vitamin B3)

Brightens the complexion, evens out skin tone, and strengthens the skin barrier.

Ceramides

Help lock in moisture, improve skin elasticity, and protect against environmental damage.

Beta-Glucan

Known for its soothing and anti-inflammatory properties, making it ideal for sensitive skin.

Texture and Application

Lightweight, watery-gel consistency that absorbs rapidly without leaving a sticky residue.
Leaves the skin feeling cool and refreshed upon application, making it ideal for layering with other products.

Overall experience

After I finished the cream and using the Ampoule for half of the bottle, I can feel my skin more supple and softer. My dry patches diminish and the most important thing is it free from the parabens and safe to the skin.

December 10, 2024

2 Comments

food

Dae.Janji Restaurant Subang[Food Hunting]

December 07, 2024

8 Comments

Why book banning is bad

Book banning is a controversial practice with significant implications for society, culture, and individual freedoms. Here are key reasons why it is generally considered harmful:

1. Violation of Freedom of Expression

Book banning infringes on the fundamental right to free speech and expression. It limits authors' ability to share their ideas and perspectives and denies readers the opportunity to access diverse viewpoints.

2. Censorship and Control

Banning books is a form of censorship that often reflects the preferences of those in power. It can suppress minority voices, controversial ideas, or critical thinking that challenges the status quo, leading to a less informed and less free society.

3. Limiting Education and Growth

Books expose readers to new ideas, cultures, and perspectives. Banning them restricts intellectual growth and critical thinking, depriving individuals of the opportunity to learn and form their own opinions.

4. Suppressing Diversity and Inclusion

Many banned books address topics like race, gender, sexuality, and inequality. Removing these books from shelves can silence marginalized communities and erase their experiences from public discourse.

5. Encouraging Fear and Ignorance

Book banning often arises from fear of challenging or uncomfortable subjects. This approach fosters ignorance and inhibits meaningful dialogue about important but difficult issues.

6. Historical Precedents of Oppression

History shows that banning books is frequently associated with authoritarian regimes that aim to control knowledge and suppress dissent. Examples include Nazi Germany's book burnings or censorship in totalitarian states.

7. Counterproductive Outcomes

Banning a book often draws more attention to it, increasing its readership. This phenomenon, known as the Streisand Effect, undermines the purpose of the ban and can make the censorship seem arbitrary or absurd.

8. Undermining Trust in Institutions

When governments, schools, or libraries ban books, it can erode public trust in these institutions, making people question their fairness, inclusivity, and commitment to freedom.

In essence, book banning limits access to knowledge, silences diverse voices, and undermines the foundational principles of free thought and expression, which are essential for a thriving, democratic society.

There is a different between a book banned and book challenge as below:

A challenge is an attempt to remove or restrict access to materials or services based upon the objections of a person or group. A challenge to a title may result in access to it being retained, restricted, or withdrawn entirely. Restrictions on access may include relocating the book to a section of the library intended for an older age group than the book is intended for, labeling it with a prejudicial content warning or rating, taking it out of the online catalog so it has to be requested from a staff member, removing it from open and freely browsable stacks, or requiring parental permission to check it out.

Challenges do not simply involve people expressing their point of view, but rather are an attempt to remove materials from curricula or libraries, thereby curtailing the ability of others to access information, views, ideas, expressions, and stories. A formal challenge leads to the reconsideration of the decision to purchase the material or offer the service. This process is governed by a board-approved policy and includes review of the material as a whole to assess if it is aligned with the library or school's mission and meets the criteria delineated in its selection, display, or programming policy (as applicable).

A book is banned when it is entirely removed from a collection in response to a formal or informal challenge.

Any reduction in access to library materials based on an individual or group's believe that they are harmful or offensive is an act of censorship. ALA does not consider weeding of an item based on criteria defined in a library or school district's policy to be a ban, nor do we characterize a temporary reduction in access resulting from the need to review materials to be a ban.

* information from American Library Association (ALA)